Not sure if this has been suggested before but it's something I've been thinking about recently.
I find myself very bored lately with all jobs capped (erm except Bard.) Yes the expansion is coming with new jobs but this cycle will repeat itself. Won't take long to cap out the three new jobs.
I still enjoy doing dungeons with friends but everyone kind of has their primary role they get stuck playing. It's hard to push people out of their comfort zone (myself included, I hate playing tank or healer except with friends) unless there is a reason to and, when you do, it usually ends up being a bunch of fun.
I think something like a Job Roulette would be fun. It might be better if it's limited to pre-made parties?
Essentially it would select a dungeon at random and then check all players for eligible jobs and then randomly fill the roles of the party. I guess it would provide a tome or experience bonus once per day.
Even crazier idea is to add some sort of expert/fun house version where there is no fixed party setup.. so it could end up with 4 healers or 2 DPS and 2 Tanks etc etc. Any combination.
I'd say it'd be even cuter if there was some sort of slot machine or Bingo type ball-roller drawing animation at the start.
Maybe the requirement for unlocking it is having one job for each role available? So that's three jobs. Seems feasible enough in a game with 9 jobs and soon to be 12. And say it randomly chooses a lower level dungeon, then any job above that level is eligible, which broadens the window even more.
Now that I think about it.. they could do a Challenge type dungeon roulette similar to the stuff in recent Mortal Kombat games.. In this case you could pick your jobs as normal but there could be some variables chosen at random for the run. Maybe stuff like Half HP, Half MP, Half TP, Slow Movement, Fast Movement, Unlimited TP, All Enemy Attacks Have Poison, Half Cures, etc etc. Lots of possibilites.
Hmmmm....