I have an idea to increase the reference monitor/preview screen (I'm aware you can make it full screen)
On my iPad 10.5", it is really small. I upgraded to a 12.9" which is better, but for my personal use (I only a couple of video tracks) there is still a lot of redundant screen space.
It would be awesome to have another UI layout option which only displays 2-3 tracks, and increased the preview screen/monitor. Please see the photos below/attached for example (a 2min Photoshop job, excuse the errors, but you should get the basic idea)