Have they been "dumbed down"? I mean... sorta. They removed choices that bad tanks would make. All the tanks play very similarly to how they did before, even with the stuff removed. People might point out DRK but honestly its still a matter of mana management like it's always been. All the tanks are more complex to play in AOE situations (possible exception being DRK since I and most people really enjoyed their aoe kit before).

If I had a complaint it would be the relative strength of our short CD abilities (sheltron/TBN/etc). I feel like DRK got the best deal on that one by a mile. Overall though, I think the tank changes were a definite step up.