I'm gonna miss class halls next expansion
I actually wasn't into the idea of them at all before Legion, but they were executed a lot better than garrisons were. They add a lot of flavor to each class and there's some really cool stuff contained in some of them (Coins of Air for Rogues, the keg buffs for Monks, etc.). They are obviously not perfect, but I like the flavor they add to the world and I've enjoyed having a place to call home that isn't forced upon me quite as hard as garrisons were.