"Easier" is not an issue, when it is easy to get in Filomena's window.
It is not safer to go in through the balcony, because it is more visible. You can deny this all you want, but the pics of the cottage and the layout of the road are clear.
It's not even intellectually appropriate (or honest) to be trying to argue that "all burglars would have used the balcony, so Filomena's broken window must have been a staging". In fact, it's entirely plausible, feasible and reasonable that a burglar might have chosen Filomena's window as a point of entry. Whether "we" think that the balcony would have been a "better" point of entry is neither here nor there.
And that aside, there are actually many other reasons why Guede might have chosen Filomena's window. When it comes down to it, the only possible and reasonable points of entry were Filomena's window, or the balcony door, or the kitchen window which was also accessible from the balcony. As I've pointed out many times before, the balcony door and kitchen window were both of modern double-glazed design, and had locks. They would have had to have been manufactured in accordance with modern regulations. And provided they were closed and locked, it would very probably have been extremely difficult to have broken in through either the balcony door or kitchen window: double-glazed panes are very hard to break without specialised tools, and the locks and frames would similarly have been hard to jemmy.
By contrast, Filomena's window was a very old, wooden, unlockable unit, with thin single panes. It was, in fact, one of the most simple types of window through which to gain entry - notwithstanding its height. But it had a wide stone sill beneath it on the outer side, which would have made it easy for any intruder to perch on the sill while effecting entry (see the C5 video of the guy perching on the sill).
And there are other factors. Machiavelli is being disingenuous about the relative visibility of Filomena's window and the balcony. Filomena's window was in fact set quite far back from the road and at a much lower level. And it was in relative darkness (anyone remember Somealibi's hilarious contrast-altered photo?!). It was also opartially obscured by a tree that was largely in leaf at the time. The balcony was indeed visible to anyone travelling east-west by car, and from fairly close by (certainly far closer than Machiavelli's Google Earth Streetview photo would have us believe). In addition, Filomena's window had the attraction of easy and unobstructed exit if Guede were discovered or interrupted during the break in. He could either go down into the canyon or back up the driveway and onto the main road within seconds. By contrast, if he were discovered on the balcony, he would have had to get round the side of the cottage to escape - a much more hazardous and time-consuming endeavour.
Also, I think it's eminently possible that Guede might actually have tried out the balcony option first. By his own admission, he was "hanging around" outside the cottage for quite some time. It would certainly have allowed enough time for him to have climbed up to the balcony and tried the door and window. As I outlined above, I believe that he - with his lack of proper tools and specialist knowledge - would have quickly realised that it would take him far too much time and effort to break in through that door or window. At that time of night, there was simply too much risk of being spotted, even assuming he was able to finally gain entry this way anyhow. Therefore he might have gone to "option 2" - Filomena's window.
And lastly, regarding the post-murder breakins and thefts, we simply do not know how the "crack" police left the cottage. We do know, for example, that the front door was hanging wide open at the time Nadeau took her photograph. Would it be surprising if the same "crack" police team had left the balcony door or window unlocked (or even ajar...)? And in addition, whoever broke in at that later time had the luxury of knowing that there was guaranteed to be nobody at home, and probably broke in in the dead of night - when there would be little or no risk of being seen by passing cars or pedestrians, and thus ample time to overcome the double glazing and robust frames/locks.
All this is supposition, but that's the point. The point is that it's ludicrous to claim that one can simply follow that maxim of "all burglars use the easiest point of ingress" as an inviolable rule. And the point is that the balcony may indeed not have been the "easiest" (and/or least risky) point of entry for Guede at 8.30 on 1st November 2007 in any case.