I tried this mod out along with Ashes of the Domain. For a change of pace I disabled Nexerelin because I became weary of games degenerating into conquering sprees and AI colony spam. When I declared my independence war (This is an AOTD specific feature) the Star Lords of the faction all decide to invade my system and they're basically invincible all grouped up. 18 fleets with whatever, doom spam, onslaught 14 spam, paragon spam, etc, all pile into my system and annihilate the place no matter how well prepared my defenses are.
Since I don't have Nexerelin on I can't use defensive fleets, and even 400% fleets from 3 High commands with Alpha Cores, it's just not enough to deal with the Lord Spamalot and his 30 Onslaughts and his 17 cousins with basically identical fleets.
I really enjoy the Star Lord mod and think it adds a lot of flavor to a game; makes the game world feel more alive. This specific case is probably just too niche to AOTD independence wars to do anything specific about, but do the Lords really need to all show up for hostile actions? Two or three lords for an offensive action would be a significant challenge for anything. Even when I still ran with my commission faction and participated in Lord-campaigns there wasn't much for me to do on campaigns. The Lords just show up and destroy everything with their very OP fleets. I think even in mount and blade you can't ever get more than 2 or three lords showing up to one major action, let alone a dozen.
An interesting AOTD specific interaction with Star Lords would be a way to convince a few Lords to defect with you in your independence war; kind of like a Crusader Kings faction or something, to give the player a chance. The way it's set up now you basically have to take on the whole faction and their Lord lineup to win the war and that's basically impossible. You could bribe them with domain artifacts, fiefs in the future, unique ships, etc.
What also might make sense is to make the Lords have more endgame player-like fleets, with tankers, cargo vessels, support vessels like salvage rigs and some troop transports to make them more autonomous but powerful expeditionary fleets rather than the 30 capital ship spam they tend to fly around with. It doesn't make sense or even practically work logistically in the players hands to use such fleets. I understand you want the Lords' fleets to be formidable, but the way it shakes out things are just excessive, and they group up in some contexts and become an unstoppable force that's more tedious and annoying than challenging.
Thanks for the great mod I really enjoy paying it. I'm not really asking for anything specific, but I want the Lords to act a little more like quasi-autonomous players that have some tension with their own faction, rather than faction npcs.