I personally wouldn't mind if tanks had more going on on their side of things. Instead of having them focus so much on DPS, have them focus on survivability. Do away with the concept of tank busters (because having to pop CDs every X seconds for a big hit is so engaging), have mobs hurt a lot more, and make tank rotations focus on defense (skills that increase mitigation, dodge, give shields, heal, w/e, on very short CDS - 10-15s). I'd like to see us have more control over our fates instead of having to wait for our healer to act.