Not necessary a bad thing if you ask me, especially when 4 experienced lvl90 player get thrown into satasha by roulette, they should clear it faster yet in a more acceptable pace.
Beside, letting newbie/sprout saw what high level job skill look like in dungeon will probably motivated them furthermore to push through the MSQ grind.
Job like DRK might somewhat punished for this kind synched system, but compared to what we have now? It's way better than what we have now.