I personally do not like lvl sync.... will force us to carry lower level gear and mess up our inventory.

If they make it optional so that I can enjoy a content with a lower level friend, or make an exp party with lower level persons, it is ok, but if level sync means that if I enter a Lv25 Dungeon I am forced to play as a Lv25 character, then no, please. Really don't want that.

It would also be illogical; what if I have a Lv50 class and wanna go farm lower lv gear for another class of mine? Can I not use my higher class to farm in a lower dungeon, as I would farm on the un-instanced open world?