Battle leve's need a major rework.

They removed them in SB because they weren't "popular enough" and worth development time. I wondered about this until, while leveling recently, I tried out a few. A lv54 leve (which requires teleporting to a different region) gave me about 16500 exp, where I needed about 1.7m to level. This means that a full leve allowance of 100 would not be enough for a single level.

A big problem with FF14 is that dungeons and palace of the dead give far better exp than other sources, thus you get funneled into only doing this content. There's no reason not to put other content on a similar level so that you can pick and choose. A few changes I'd like to see with a return of battle leve's:

-Exp increased
-Armory bonus applied for alt characters, similar to Fates
-Beckon leve's removed, seriously screw these.
-Add a little back story, like several of the leve's link together and unlock a quest leve