Why not look at the instinctive direction instead?
And BTW there is a huge physical clue confirming what the direction was.
Kids aren't always predictable and whatever seems logical based on experience with some kids won't necessarily be what a particular child would do, but anyway...
The front door isn't impossible, but if she'd got up and decided to wander off, I'd have thought she'd head towards the light (a light in the living-room was on) and try to get out via the patio and downhill towards the Tapas (noise, possibly familiar voices, and more light). Running that way would make more sense as well if she'd been frightened by someone tampering with the blind / window.
But then, would a child that age have thought to close the patio door, the child gate (unless it automatically sprang back to close) and the bottom gate (unless that, too, had a tendency to swing back to closed)? And wouldn't she have instinctively taken Cuddle Cat with her? I'm less convinced she'd have put shoes on unless she had slip-on sandals (i.e., no straps to fiddle with).
I can only think of a few likely reactions if scared by noise:
- freeze, grab CC and pull the bedclothes over her head. This didn't happen, judging by the way the bed was left.
- scream the place down (but no one heard a child that night), grab CC and run out of the patio. However, that would assume that the handle was accessible to her and that she was strong enough to slide it (possible), and, particularly if scared, would she have thought to close it behind her?
An alternative, which I find plausible, is that she'd got out of bed for a pee (hence bed still tidy and no thought to grab CC) and was already up when an intruder did get in via whichever way. A big hand over a little face to stop her screaming could have unintentially killed her or at least knocked her out. The next question, IMO, would the intruder have carried off a dead / unconscious child or just let her drop and run off?
It may seem intuitive to speculate drop and run as the most likely, but Vincent Tabak went to considerable effort to carry out and hide poor Jo Yeates's body.
The problem with all of that is that there is no hard evidence... Wouldn't a child leave prints on the patio door? Would that necessarily mean anything significant if there had been? (She had lived there for five days.)