You're thinking mixer. Gary Cioffi has been Transit's mixer (and producer up until YNE) since Torre (his son) came on board. The producer decides how an album will sound, in general, and Gary has great taste (hence the quality of this and L&F) but YNE's producer (Ted Hutt, not Gary) did not have the band in mind, in my opinion.
Oh, so Gary produced this? I should've known, the dude knows how to do vocals (check out some strangers debut for more proof). It's really a bummer he didn't do all of young New England. It wouldn't have been perfect by any means, but it would've been a heck of a lot better.