I think WH3 has broken my 7 year addiction to this game. I played and turns of a dwarf IE campaign and logged out with no desire to play anything else.
Yeah, I know the feeling. I just played 10 turns of a new Festus campaign, and it's already left me pretty indifferent.
There's obviously so much that needs tweaking, fixing, revision, rethinking and outright removal (hi there stupid tower defense settlement battles) that it's really hard to enjoy TW:W3 even with Immortal Empires.
Plus, Creative Assembly has taken a page from the Blizzard playbook and are aggressively nerfing any old elements that might make you play the game the "wrong" way. There's the massive nerf to the Knowledgeable trait Muurloen noted above (among many, many other trait nerfs), the removal of free skellies from Vampire Counts, and dozens of other little edits that each make the game a little less fun to play than TW:W2.
Quick example: for Warriors of Chaos the Dragon Ogres, Dragon Ogre Shaggoths, and Hellcannons are all "gifted" units now - you're capped to a max of 6 for most armies. I guess that's payback for the years and years of Shaggoth doomstacks being one of the few viable WoC army compositions. However, not only are you restricted in the number of those units you can bring in any one army, there are no techs to improve those units anymore. Your lord's red-line skills are the only buffs they get. Giants and trolls, however, get a those same red-line skills AND a massive +15% damage boost and 25% missile resist via the tech tree. So fuck you for liking Dragon Ogres, I guess. (EDIT: It looks like I might be wrong on this - I was looking through the .pack files and there might be a tech for them, but only for certain WoC factions? Dunno, but my point is they're making tons of weird little changes for no clear reason.)
Maybe this will be good by Christmas or the 1-year anniversary of the game's release? Maybe modders will continue slogging through the endless sea of data tables to make this less of a chore to play? I don't know, but I'm already looking at going back to that Beastmen campaign I was messing around with in TW:W2 the other week.