I don't get this 'get good' nosense.
That mechanic is just forcing players that weren't part of the PvP community to join it just to get a nice vanity. Sure, PvE may have some exclusive rewards as the one given on the last halloween event (I don't remember its name atm) and the jumpeon stone, however it would be really dumb to compare the effort and dedication that each one requires.
I'm not complaining about the update, it has a lot of useful mechanics and the community needed those incentives (OU being the only tier getting attention was really unhealthy). However, it's understandble if a player that was never into that stuff gets annoyed about it.