The whole point of a pre-fab group would be to pick people you want in your party based on your own criteria. That's how that whole /shout spam thing works, Party Finder is just a refined version of the same system. You aren't obligated to stick with someone if you don't like them. The party belongs to the leader. Neither the leader nor the other party members should be forced to keep someone who's either intentionally wiping in dungeons or just doesn't seem to be able to cut it after so many runs.
While we aren't talking about kicking someone due to an unagreeable gib, that situation doesn't quite apply here since the unagreeable gib owner wouldn't be invited in the first place.
You're talking about vote kick, we're talking about the dungeon run failing, running out of time, and the leader kicking someone between queues...
Edit: In fact, that's a non-issue within this topic because the OP simply wanted to be able to re-queue with the same team so the learning process doesn't have to start all over again, which more or less means allowing for some who take a little longer to learn.