I am utterly obsessed with this game! My only real complaint is that I find the text very difficult to read sometimes (especially the red text). I'd really appreciate some UI customization: font size, font brightness in comparison to the background (maybe even the ability to tweak the background's saturation too), that sort of thing.
Apart from that, I think it would be nice if you could mouse over routes on the map to see how long they'd take. And to have maps of the facilities themselves, because I get pretty confused trying to navigate Astrape XD