After forming my own low level grind/FATE party the other night, my only complaint is the lack of a level sync option. The massive penalty to XP for being partied with a higher level player or attacking a monster much lower level than you means that lower level players will increasingly be left behind.

The alternative is to be forced to attempt join the high level FATE train and run past mobs that can one shot them with a glance. Getting an actual party invite to the train when you are below level 6 seems to be hit or miss, and attempting to join high level FATEs without a party usually means you get nothing contribution wise.