Pouk, I'm very impressed with all the work you've put into this mod. I've already downloaded it and played a couple rounds with the AI and it kicked my butt, probably because there's no effective counter to the swarms of missiles the Vaygr kick out.
I have several suggestions that I'd like to put forward:
First, I've read the whole REARM thread and I can propose some solutions to your English translation issues. An Outpost is a temporary fortified position, usually built of dirt or sand-bags, with a very small staff. I think the term that would better suit the smaller Vaygr battlestations you want to build is a Border Fort. A fort is a permenant fortification, built of stone, dirt, and concrete, and armed with cannons and artillery. A Fortress would better describe a larger Hiigaran battlestation, ideally one with the capacity to build ships because a fortress is the proper term for a fortified city.
Second, I have a proposal for how you could differentiate Dreadnaughts from Battleships. The word 'Dreadnaught' is a rather archaic term that means 'fears nothing'. It would be appropriate, then, if Dreadnaughts were Battleships specifically designed to destroy other Battleships.
Third, I have a couple of suggestions for Hiigaran frigates when you get around to them. I think the Hiigarans would benefit from a proper Assault Frigate armed with a pair of KE turrets (I would make them single-gun turrets, rather than the double-gun turrets used on destroyers). Also, your impressive Swarmer video shows that you've pretty much got swarm attacks programmed, so I propose that your new Drone frigate be granted a buildable module that would give it a pair of forward-firing KE guns and swarmer-style drones so that it can act like the Hive frigate in Cataclysm.
Finally, I can't figure out what the purpose is in having two types of KE and artillery turrets for the Modular Destoryer. Why not just use one turret of each type?
I hope these ideas are helpful.