A I have a feeling that in the first trial, the defence lawyers didn't fully grasp the significance of the time of death. I think they may have not seen the full value in challenging Mignini's ever-later ToD, which culminated in a unchallenged ToD (which was accepted by the court) of around 11.45pm.
B And I suspect that this is why they didn't focus much on those parts of the computer evidence which they knew at the time of the first trial - the activity at 9.10pm and 9.26pm. In other words, I think they simply didn't think that evidence pertaining to this part of the evening was relevant, in the light of the prosecution's claims of an 11pm+ ToD.
C And the reason that I think they may have acquiesced too easily was that they didn't realise the significance of the autopsy stomach/duodenum contents, and how they related to ToD. They should - in my view - have realised that the autopsy findings showed that Meredith most likely died before 9.30pm, and almost certainly before 10pm. And then they could have brought the computer evidence back into play, since clearly it would now be highly relevant.
D And this brings me to an important point: I don't think that either Bongiorno (for Sollecito) or Dalla Vedova (for Knox) knew where to look for the most effective and impressive expert witnesses. I don't think Bongiorno had ever tried a murder before, and Dalla Vedova certainly hadn't. They were therefore almost certainly unfamiliar with the community of medical experts (national and international) - a subject with which a defence lawyer with plenty of experience of murder trials would have extensive knowledge. It's often stated (as "fact") that Knox and Sollecito got "the best defence money can buy", but I think that in the area of medical experts (and computer experts for that matter) Bongiorno and Dalla Vedova did not choose well in the first trial. And in the area of medical expertise, I feel certain that internationally-renowned pathologists could and should have been found who would have clearly stated that Meredith probably died by 9.30pm and almost certainly by 10pm.
BTW, I see that some people elsewhere are still unwilling to accept the position held by some of us here regarding Meredith's ToD without it being validated by the medical community. Well, not only HAS it been validated by medical professionals, it's also entirely consistent with all the available medical and academic literature on the subject. What I want to know is why nobody has managed to produce a medical professional or medical/academic paper which refutes our position. I can only conclude that some people have looked hard and failed to find anything.