Eh, the community will never agree on anything. Different people have different tastes. I've seen a few of these threads online, but I suspect they're not the majority.
Personally speaking, the only expansions I really didn't enjoy was Cata and WoD. Wasn't too fond of TBC either but it wasn't terrible.
So far, while it isn't perfect, I'm really loving this expansion. As long as we don't have a massive content drought and the team doesn't do anything really stupid, should be a good expansion.