Right now Ideology looks to be a cross between GalCiv2's good/evil, and Civ 5 Ideology. That's not as different as I invisioned.
What I'd like to see: have the random events have a chance of random consequences. (at least in SP) Choices become more unpredictable, I'd even hide the amount of gains/losses and randomize those. Maybe 1% of the time those random events end up being/causing super events. You might get some unique bonus, or it might go wrong.
I'd also like to see random events once you reach an ideology, with options between two traits on the tree, and a third choice to reduce your ideology or turn towards pragmatic. I do like the idea of ideologies having drawbacks. Pragmatics should have choices in both other directions.
The downside to my idea is that it would probably require a good bit more writing, and event coding. The benefit is you get more game-to-game unpredictability which would add to longevity, provided mega events are rare enough that it takes hundreds of games to get them all. Another potential downside is feature creep/getting away from focus of game, but I think those things are mitigated here. Ideology is something where I'd want to avoid beelining if at all possible, outside of RPing your race.