As someone that tends to grind classes via FATE/levequest, I don't really sympathize. There's more than enough leves to go around if you do other stuff too. I'm sitting on 91 allowances right now and scratching my head as to how I'm going to use some up so they don't max out. Asking for the devs to put in more quest chains is basically asking to be spoon-fed more exp. Experienced players no longer need pre-written quest chains in order to level up, as they ostensibly know other ways and have met people along the way that they could party with.

As far as your dps queues, make friends with a low level tank or go with one of your friends while they level tank.