Have you even played Vashj'ir? Movement was awesome there, it was fast and quick after you got the buff like doing the 2nd quest there. You had a %480 speed mount. And combat as a melee was very very engaging. I played a feral druid, fury warrior, Retribution paladin, Frost Death Knight all through vashj'ir.
You might not like the underwater zones, and thats ok. But Vashj'ir and 1k Needles both give you huge movespeed bonuses underwater. So dont complain about speed.