Anything more specific on the UI? Though that probably deserves its own thread.
The thing i noticed about the UI was that it often feels like a maze to find the information i want. There's always the tab with supply usage, etc open in the bottom left, then i click fleet and more stuff pops up, but i dont remember what does and doesn't pop up so i just always click fleet when i want to read it. And i might as well anyway, because then if i want the full information i need to mouseover, THEN press f1. Also, when the fleet information stuff pops up in the bottom corner, its very small so when i mouseover to get more detail the small delay if im not paying attention leads to having to mouse over and wait for the same thing twice. Because you are extending that portion of the UI anyway and it is only in the fleet screen, i suggest that column extend much further up so theres more room for all that info, maybe add more under each bar so it can be accessed at a glance.
The fleet screen itself is pretty iffy too, it'd be nice to get the same information popup that you do when mousing over ordinance points on the refit screen, on the fleet screen. Also, when you mouseover each ship right now the only things that pop up (name, supply usage rate, percents) could easily just be there all the time, i don't know what the point of having that info only on mouseover is. it may sound like im giving scathing criticism, but all in all its very functional and it works for everything i've tried if not with
maximum efficiency, these are issues that would be good to look at just if you're looking at a polish pass. it may not even be worth doing until the game is in a more complete state with all the extra knobs.
unrelated to UI: Because the ships i like to have in my fleet never restock, and getting wiped out gives you a lot more XP, i've taken to storing my fleet in the abandoned station and then buying a fleet of lasher hounds talons etc and suiciding it for tons of experience. Note: the economy involving supplies is great now, i really like the balance between your maintenance costs and the cost of expanding your fleet, but it also means that once i store my main fleet, i can welp a fleet of cheap low tech hulls for the same cost as a few day's supplies as a way to farm xp.
Also unrelated (im really going all out on the general feedback here, i hope you dont mind): Is that since the hull modification changes i've noticed that guided missiles, for the most part, really suck. I attribute this to the added speed many ships have, and the previous missile speed buff that perhaps left them going a bit too wide to begin with. Its just a bit too easy to dodge stuff like MRMs, SRMs (even before they start burning), atropos, etc. For the same reason i never use them anymore, instead opting for slower missiles like LRMs, swarmers, etc or unguided torpedos.