DPS display could easily be solved with a system already in game.

[Varilae]

snip

You have to try pretty hard to fail normal dungeons in terms of DPS, even the newest dungeons. There never is or was (to my knowledge) some sort of epidemic of players being kicked from duty finder dungeon queues because their DPS was not top-tier. I highly doubt this will suddenly be the case on the off chance an official parser is introduced to the game. Will some people gloat about their numbers? You bet. There's also plenty of people who won't. There's all sorts of people out there and I'm noticing that everyone is worried about the worst case scenarios when it comes to how the community will react to parsers.

As far as job balance goes... well, yeah, if there's one job out there that severely under performs compared to other jobs, people would be less likely to take it. This isn't a new thing. Luckily for everyone here, all jobs, at least from what I've seen, perform well in this game. Summoners have it a little rough right now but they can do just fine in final coil (My static had a summoner and we made it all the way through final coil). Keep in mind, people can already analyze the jobs like this on PC. I have never seen PFs strictly stating "this job can't come". The closest thing to this is people wanting Monks for final coil due to mantra or early on where Dragoons (apparently) could not survive certain attacks in coil due to their magic resist (this was fixed). I really don't know if not letting certain jobs into PF groups is a common occurrence , so someone correct me if I'm wrong there. The devs seem pretty good about maintaining a good class balance so far.