"Not yet. People have left, so there's clearly some way to do it, but no one really sticks around long to say anything about it one way or the other. They're just gone. Admittedly, it could be attributed to the pocket universe not entirely being stable, but it doesn't feel unstable enough for that, if that mae sense?"

It's been weird, yes. But other than the fact that there's only so much space that they have to explore - and the TARDIS being unable to connect to the Time Vortex - it hasn't been the sort of weird that would suggest either massive temporal instability or massive spatial instability.

Which doesn't help solve any of the mysteries of the place, but at least it helps close off some of the potential options, even if it's not a very big narrowing of the field.