I have several quality-of-life suggestions:
1) when choosing armour for a warrior, ability to search ("q") would be welcome,
as well as ability/ button to filter armour (similar like items list can be filtered) by environment - underwatter, space, covert ops, etc.
2) Search function in building facility menu - in mid/late game the list is getting quite long and chaotic.
3) In setting, i would love to see option to make all wounded crew to be automatically de-armoured, as you usually have more crew than good armour, and dearmouring them manually is tedious (and de-armouring everyone en mass with "x" is also often inconvenient)
4) It is very convinient that in Inventory screen, you can see weapon damage for selected fighter (by pressing alt and hovering cursor on the weapon). It would be even more convenient if in addition to damage, it would show how well it penetrates armour (Armor effectiveness) (and abbreviation of damage type perhapse) Sure you can alt-tab to a wiki, but when you are choosing what sword (of some 5-10 you have) to give to this or that gal, it would be very convenient to see that information in-game.
--- merged by Solarius Scorch. Two posts in 30 seconds??? ---
New enemy unit ideas:
Technocracy:
big 2x2 tracked unit with humanoid torso & big guns in arms (essentilly T-1 terminator)
Flying 2x2 unit with rotors/jets, (kinda like Hunter Killers in the movies)
Daemons: Well, many daemons from Doom2 are still waiting their appearance, especially powerful ones that would make daemon faction dangerous in lat-game:
Cyberdaemon would be interesting and valuable to implement, giving daemon faction anti-tank punch to keep them threatening in late-game. To stress the late-game anti-tank role, could swithch/randomly loaded with normal explosive and anti-tank missiles.
Spidermind: essentially spider daemon with more HP, 14mm chaingun and perhapse a force shield.
Pain elemental would also bring new trick to the table, (also should be easy to make, mostly re-coloured cocodaemon); it's spawning i thing should be made as shooting attack thad deals some concussive damage and then spawns flying skull unit thing near the impact poing.
Fatso Mancub would also be a new challenge, armed with heavy flamer and/or Arena Fireball Launcher.
Spartans
Being just a human faction, I think they shoud get armoured car with some anti-tank gun (105RR); or even a new lighter custom unit like jeep/toyota with a gun mount. I mean cmon, even bandits have armoured cars, it's weird that spartans get nothing nd become joke beyound early game.
Deep ones are another factions that starts struggling pretty early on (especcially in land missions), and needs some late-game unit love to remain viable threat and not just safary meat. As such I suggest some big/boss units:
2x2 giant enemy crab, with tank-level armor and massive melee damage; could have a variant with deep one/aquatoid riding it with sonic cannon.
2x2 lovecraftian Starspawn aka baby-cthulthu. flight, melee claws, ranged "magic bolts" attack with Psi/warp damage type to threaten tank but not necesserily obliterate infantry; and perhaps mind control/terror. Being of unnatural origin, it should be immune to poisonous gas, so widely used to exterminate the deep ones in general.
2x2 shoggoth: big mass of flesh (perhaps made by merging together multiple fartbag sprites) that attacks at range and in melee with powerful corrosive attacks (blast/rapid fire ranged ones, low-tu cost melee ones). Low armour but high regeneration.