There are a couple really easy tweaks to make this game better and surprised there isn't a mod for this yet, but looking for a mod to disable Mobile Rulership. It completely disregards all aspects of the Homeworld win condition and is genuinely unfun to play against, even for computer players.
If it only could be made on a Titan that would make some sort of last stand scenario unless they reclaim their homeworld, but as it is right now it can literally be made anywhere and turns it into one of the most drawn out games you can imagine.