Loads of drawbacks--yet frustrating users by breaking existing functionality is not one of them.
The bottom line is that there are two choices: doing what's best for users or what's most fun for developers. Volunteers, they may be, but "with great power comes great responsibility"--they ought to be more considerate of existing, loyal users. Oh well, there's always MATE and Cinnamon.
Please, lose the political correctness. Hey, I don't typically call girls "guys" either, but many people do, and you know what he meant, so don't go picking a fight.