Its very hard to rank up pass rank 4 if all your jobs are 50.
A few have been lucky spamming Dark device's to gain a large amount of exp for their bird but now that that been nerfed there aren't any good spots to lvl your Bird either the place is over camped or you cant Duty Finder with you bird out so it's pointless.

Basically make it that you can Duty Finder while your bird is out so we aren;t limited to progress in this game

And exp bar (with numbers) would be nice to see for you chocobo

give us leve that we can get exp gain on chocobos as well

it will take like a year to get to rank 10 lol.