Any super cool mods for it lately? Something with a lot of meat, say.
Most modders moved onto CK3, though so far, CK2 mods are far better than CK3 ones this early in the development, and probably will remain that way for another year or two.
The best mods I know of (in no particular order):
The Winter King – some very cool features there (love the dynamic creation/destruction of de iure duchies, for example), lots of aesthetics to it. Set in England and France right after the fall of Rome
Elder Kings – total conversion into TES universe, pretty cool with tons of various features
A Game of Thrones mod – total conversion into The World of Ice & Fire, again with plentiful features (though fairly sparse in areas not covered by the series' books)
Nova Monumenta Iaponiae Historica – Mod that covers medieval Japan. Not actually all the finished, with few features of its own, but chock full of Japanese autism. The dynasty trees are something outta this world, like holy shit. Play it if you feel like playing vanilla, but in Japan
Warhammer: Geheimnisnacht – excellent, fun mod that converts the game in Warhammer Fantasy. Unfortunately I tend to run into severe performance issues after a couple decades of playing, but maybe that's just me.
After the End – a rather silly mod that deals with post-post-apo Americas that are now essentially in the middle ages with feudalism, various religions that worship the atomic blast and the llike. Pretty fun, though silly