This is my concern too, however, in reading more comments in the main mod thread there seems to be some type of scaling involved when you do complete a quest.
One comment I saw, he was level 18 and completed a Level 6 quest, and got 20 XP for the completion. (which is trivial in the end of the day if that's case..) I think it will take more people to continue to test and post back their results to truly see if the leveling experience is broken in a different way now. Overall though this could be better than nothing since it seems their planned patch is going to take longer than anticipated from how cryptic the devs are being now.