Increase EXP from side quests once main quest complete or max lvl a class

[AmpelioB]

Not true at all.

You might make more from the time investment by doing a FATE, but just killing random mobs, absolutely not.
And they don't want side quests to be more lucrative than FATEs, because then no one would do FATEs, they'd just do the sidequests where they can skip five pages of text in 30 seconds and instantly get 20% of a level.

I disagree, nowadays Shared Fates make doing FATEs a more investment than doing sidequests but I do agree that sidequests could have more investment like maybe and title or achievment rewards just from doing the random sidequests. afterall even levequests have them.