After all of this, I feel like the aliens should have the aliens should have a massive ship that spaws only once every 5 cycles or so and its goal is to wipe out every system on the map. Every station it destroys will have a cool down on ship spawns so it would remain really weak for a long time. So basicly it would give the player a reason to stick around and defend the factions and build a giant fleet in order to remain alive after the attack since stations wont give supplies or fuel after being destroyed for around 1 cycle to keep it realistic. Since you said you would add station capturing and such things like that, I believe it would be possible...
Actualy I have a simpler idea how to do that, the alien planet class (because i guess that the mothership isn't challenging enough against the dreadnought variant I have which took it down in less than 10 seconds...). Since the dreadnoughts were actualy taken down, ISA would have built a massive America Class ship which would be based off of the alien technology after the first massive attack at Grant which consisted of only one massive ship, the Annihilator (<== not sure if spelling is right
). In size it would be 6 times the size of the dreadnought so it was basicly impossible for ISA to stop it... Unless they built Code 57... 2 times the size of the dreadnought, 10 flight decks and over 300 ordinance points! Unfortunatly, RSF found out about the project and the spy which gave them the information did not say it was to defend humanity against the biggest threat they ever faced so they decided to build a ship in order to defend themselves from what they believed to be a secret ship to destroy their faction... We don't have any information on what they are building, but what we know is that it might look like a threat at the moment, but in the futur when they might come back RSF could still help.
I stopped thinking about complex stuff and started thinking about a really cool thing to add to the mod, not too far away from your current plans and if you don't want to consider this idea I could still make the ship sprites for such an addon since there would be 3 new massive ships to add to the current mod, the only thing you would really have to do is code for the events to happend and I would probably ask you a bit of questions on how to code certain things if I don't find the answer on the forums! I will have my *** laptop on christmas vacations and it can't run good games on it either so I will basicly have alot of time to work on these, I don't expect you to say yes at the moment and one thing I have to mention is that I will try my best to make them look as close as I can to your design style to not make them feel out of place
I have really good ideas about some designs and I will take alot of time to make sure everything looks really good to you!
Idk why I really want to help you with this or why I like throwing myself at such a big project, but what I know is if you say yes, I will work my ass off and be really happy to actualy do something of my life
I will try to make most of this on my own but if it becomes really to big for me I will ask you some help. Its mostly going to be questions on coding but other than that, theres nothing else really.
If you read this pointless mesage and accept I would really appreciate
Spoiler
Holy crap this is long -_- Feel bad now...