My opinion is leves are nothing more than a poor knock off of the quest system found in WoW and other mmos.
When you can grind the same exp or more by simply solo grinding, there really is no need for it.
The reward of gil is also a joke as you can easily farm mats to sell while grinding and make a much better profit, and not have 50 random items that don't stack.

I hope to see the leve system completely replaced in 2.0 with something that is actually fun and rewarding.