Warriors have no real disadvantage, so yeah, they could use more nerfs or the other tanks could use some buffs.

Paladin is my preferred tank, but I barely use it anymore. It doesn't bring much except a bit of utility in crisis situations that shouldn't happen, like keeping the last healer alive with Clemency and using Hallowed Ground to buy some extra time or eat a mechanic solo. It's got a pile of CDs that are all basically the same idea and not much better than Inner Beast. Divine Veil is worthless except to see people's health move a little less on an aoe that they were going to be healed for anyway.

Warrior is the best right now both for real tanking and for "meh don't need a tank, just dps" tanking. There needs to be better balance so that it's more about preference instead of warriors just being better. They definitely weren't nerfed too far and could use some more tweaking. Before warriors were reaching the point where they didn't even need healers. It was ridiculous.