It's not the issue is "not being considered", it's just that 768 vertical is really seldom used nowadays, even on laptops, since most of the ones which are capable to run either FSX or P3D are at least 1080p.
We still haven't published any update related to the UI but, when we'll do it, we'll TRY to find some time to look at the UI and see if it fits into 768 vertical size.