DK gets some minor buffs to UH. So nothing for us boxers so to speak.

I do believe that the comps are hard to compare and specially not against each other, in a 4v4 arena between 4 dks and 4 shamans i bet my money on the DKs.

For overall gameplay and fun, i actually don't think there is any difference. Both teams are viable for most things in game, just in different approaches.