Leve allowance idea...

[Felis]

In other words, make leves utterly useless.

There have to be a balance.
a limit of leves or reduced exp, so the level speed don't change too much.

Or after every 24 hours the first 6 leves give 100% exp and then only 10% until the next daily reset.
Also there should be a signature check, so that there is a penalty of 25% reduced exp if you just buy the needed item instead to craft it.