It's hard to say for me. Some of them really got me hooked well others felt very bland. Maybe it's personal preference or maybe the dev team put in more thought into some more so than others.

I'd really love way more story/lore from each job honestly because it really draws me in, I also loved the little touch of once you had advanced from your base class and into a job than went back to your class trainer they'd have something else to say in remarks to you changing into a job, which is basically like this awesome legend kind of thing at times.

As for the group/roulette stuff I think that would be pretty odd, mostly cause it might consist of four people all being the same job? Either that or the roulette's would take way to long because job A needs this but jobs B and C don't, going by our tank/healer/dps roles. They would have to make changes to roulette which doesn't seem likely.

Still I'm never against more story/lore stuff.