I think they could do a few things to improve leves in the future.

-First off I would probably give separate allowances for battle craft leves and field/trade craft leves since it feels weird having to choose between fairly lucrative crafting leves (for new players) and leveling an alt DoW/DoM class.

-I would love to be able to do battle craft leves up to the maximum level. Maybe limit it to two levels per day for 6 leves to not make it overpowered and help break up the tedium that comes with dungeon spamming. Also, it would probably be a good limit the amount of gil rewarded to discourage bots etc from doing these.

-A party finder for leves would also be nice, especially for those leves that require groups.

P.S. There's a lot of other good ideas in this thread. I hope they introduce some of these changes