I've played Interregnum for around 20 hrs and I liked it. When playing Star Wars factions it feels like you're watching Star Wars movie. That's because of effects: shots, sounds. Also because of dynamics of the game. Altough I liked playing this mod, it's not without flaws:
1. Vanilla Sins factions. I know that it is crossover mod, yes, but I never liked them. I have no emotional or any other connection with them and that's what bothering me to play vanilla Sins.
2. Command. Too little command. ~9 ISDs at maximum, realy?
3. VSDs and Venators as capital ships when you have Tector, Dominator, ISDs? Realy? This may come from playing a lot of EaW and ICW, but still.
Overall this mod is kinda cool, but I still prefer Ascendancy and I doubt I will ever prefer Interregnum when I want to play some Star Wars.