Level Syncing isn't the best solution

[NanaWiloh]

I think the problem stems down to the fact there will be players who aren't synced down at all or not by many levels, while you would have others at the max level with everything at their disposal. I believe someone mentioned but a fresh lvl 20 tank for example might have a lot of trouble maintaining aggro while trying to compete with two high level dps busting out all their moves.

Probably the best way to testing it is going in to let's say a lvl 60 or 70 dungeon as a base class (like GLD, CNJ, THM etc) and having them compete with actual jobs (PLD, WHM, BLM etc) and see how they perform. Not having access to a full skillset can often cause a big imbalance and that's essentially how it could get for new players to do older content but matched with high level players with all their actions.

Balance is issues are my biggest concern, I mean imagine a low level tank in Sat trying to hold aggro against a snyc level 70 blm who has all their abilities. Would not even be a question can the Blm pull aggro off they tank cause they would. You will have a problem worse then WoW, we will have high level dps carrying low level tanks through places like Sat cause the tanks wont be able to hold aggro. In turn the tanks dont learn anything about tanking which is already a problem in and of itself..If you dont like sync'ing, then run the dungeon unsync'd and go ham. If you choose to run with low levels then you choose to snyc.