Great work. I personally can dig all of the redesigns you've made from a cosmetic perspective.
Something I personally like about the current factories that are in the game is that you can clearly see what is being built inside of the factories, which is very important from a game play perspective when a player is scouting enemy land factories, air factories, and naval factories too. The fact that the unit being built inside of the factory is easy to see and is recognizable, not being blocked by roofing or walls on the factory, I think is very important for the game. A piece of advice I would like to add is I would consider removing the pillars & roofing from the UEF land HQ factories as well as from the Aeon land HQ factory; or at a bare minimum make it no harder to see what is being built inside of the factory than what is currently in the game.
Anyways, great work! Glad to see it coming along.