I would like to find out what people think the motivations will look like.
I think it is clear that Hellmann will say that there is no evidence of a staged break in.
I think he will say that Curatolo and Quintavalle offer no testimony of value. The former because of the contradictions (disco buses and first police interviews), the delay in coming forward, and his admitted drug use at the time of the murder. The latter because of his first interview conflicting with his final testimony and the other employee's contradicting account.
Nara's testimony can be believed as the best truth she can remember, but really, even if she heard a scream and heard people running, it really doesn't go to naming the perpetrators. Her precision on the time being lacking and dubious ability to hear precisely what she reported also diminishes the value of her account. Hellmann may well also say that the time she thinks doesn't really fit with all the TOD evidence.
All three of the above witnesses were first discovered by the media after giving different accounts to the police. I would think that the first two should be charged with calunnia.
The footprint on the mat will be judged to be compatible with hundreds or thousands of feet in Perugia. The luminol prints will be judged to be from an indeterminate substance and the prints vague and not a match to Amanda. Hellmann may point out that not getting reference prints from the other girls was a major mistake.
The mixed DNA and Meredith's blood will be shown to be normal in a shared bedroom, particularly the way Stefanoni collected the samples.
I can't think of any other direct circumstantial evidence right now.
How do others think Hellmann will write the motivations?
I largely agree with everything you wrote here about what Hellmann is likely to put in his motivations report. Since the murder/sexual assault/staging/theft acquittals will be on a 530.1 basis, I think that Hellmann will address every piece of prosecution evidence (or non-evidence) related to these charges, and will explain why his court has concluded that none of them tends to point to the guilt of Knox and/or Sollecito.
He will obviously write that the DNA evidence "against" Knox and Sollecito is fundamentally flawed (for a variety of very serious reasons) and is therefore inadmissible.
He will write that Curatolo, Quintavalle, Capezzali and Monacchia are unreliable as witnesses.
He will write that the time of death is likely to have been well before 10pm, according to all the available evidence (the autopsy stomach contents, the failure of Meredith to phone her mother again after the aborted 8.56pm call, the curious phone activity on Meredith's UK phone around 10pm, the likely position of Meredith's UK phone when the MMS message was incoming at 10.13pm, the state of dress of Meredith at the time of her death, the timing given by Guede in his Skype call).
He will then write that this ToD, when put against the known location and computer activity relating to Knox and Sollecito, and the known presence of the people in the broken-down car, means that it would be very unlikely indeed for Knox and/or Sollecito to have been present in the cottage at the time of the murder.
He will state that Meredith's neck wounds were very likely caused by one knife, the imprint of which was left on Meredith's sheet. I think he will also state that it is entirely possible that the murder was committed by one person working alone. Note, however, that he does not necessarily have to mention Guede in this respect: his court's only job was to judge Knox and Sollecito.
He will write that the bathmat print cannot be attributable to Sollecito with any degree of accuracy, and that it is also a potential match to Guede. In addition, he will write that the lone print is not in itself evidence of a clean-up of other prints in the vicinity - he will state that the print was likely made by the subject stepping in dilute blood/water in the bathroom, rather than by the subject stepping barefoot into Meredith's undiluted blood around her body (thus negating the theory that there "ought to" be other bloody prints in between the bedroom and the bathroom).
He will write that the blood evidence in the bathroom is entirely consistent with Knox depositing a small drop of blood from her ear-piercing exercise onto the top edge of the tap (faucet) some time before the murder, and that the mixed DNA in the sink is entirely consistent with Knox's normal ablution DNA (e.g. gum/cheek cells from toothbrushing residue) being swabbed up along with Meredith's dilute blood. He will reference the shockingly unprofessional and improper "smearing" collection of these samples that is clearly shown in the crime scene video.
He will state that the state of Filomena's room is in fact entirely consistent with a real break-in. He will criticise investigators for failing to conduct a professional analysis of the ground below the window, and for failing to secure the condition of the inside of the room (to the extent that Filomena herself rummaged through the clothing, and took various items out of the room, even after the discovery of the murder).
There are, of course, many other pieces of evidence and testimony that Hellmann will address in his report, but these are probably the main ones relating to the murder/theft/staging acquittals. It will be extremely interesting to see what he writes regarding the Lumumba slander verdict.
As a slight aside, bear in mind that Curatolo and Quintavalle will not be charged with calunnia. Their testimony - bogus and unreliable as it was - never constituted a direct accusation of criminal conduct against Knox or Sollecito. Curatolo merely said that he saw Knox/Sollecito in the square/basketball court that night, and Quintavalle merely said that he saw Knox in his shop at 7.45am the following morning. While both men's testimony strongly supported the original prosecution case - and, importantly, it directly contradicted Knox's/Sollecito's version of events - neither man directly accused Knox or Sollecito of murder (or any other crime). Therefore calunnia charges can never apply here, regardless of the fact that both men will be totally discredited by Hellmann's report.
And lastly, as another aside, writing "direct circumstantial evidence" is a contradiction in terms: evidence is by definition either direct or circumstantial. In this case, in fact, there is zero direct evidence. Everything is/was circumstantial. And it's important to note here that it's fallacious to assert that a wholly-circumstantial case is by definition a weak case: nearly every single case that comes to trial is either mostly or wholly circumstantial. The point is that there is weak circumstantial evidence and strong circumstantial evidence. It so happens that all the circumstantial evidence in this case was weak - much of it risibly weak. A strong circumstantial case will almost always result in convictions. A weak circumstantial case should usually result in acquittals. That's one reason why the Massei verdict was so dreadful, and it's exactly why Hellmann's court's verdict is entirely correct in regard to the murder/sex/staging/theft charges.