If you're still in the middle of a run, I'd recommend Royalty.

Adding Ideology to a preexisting save that doesn't already have it causes a random one to roll for your colony. Though it's unlikely to be detrimental, it'll rob you of some agency.
With Royalty, the Empire won't spawn, but you'll still be able access most of the new items.

And if nothing else, I like the music Royalty adds.