There is nothing better than to do leves, raids, quests etc. with players of the same level, rather than having one high level 1 shotting everything and making things boring, basically doing your quest for you.
Actually I can agree with this. I just feel like there could be a more creative way to handle this than XI's system. The recommended Ranks for behest and leves currently are far higher than the rank you really need to beat them, maybe make that a cap or an auto-sync for anyone higher instead.

At the very least, I would like to say for compromise sake, that if level sync is implemented then restrict the current power-leveling abuse as well. I kinda feel like the only reason that's possible is to accomadate people who want to play with friends anyways.