I really do not think increasing the rate at which skill is gained is needed. I don't think it's unfair that you need 10k moat for a Lu. I do think the fishing cap limit is complete bull. I like to fish in this game, and I feel almost cheated that I am forced to stop because of what RMT "use" to do. SE didn't punish them, so they punished the players.
I actually made a second character, leveled it a good while just so I could continue to fish. My guess is that is what RMT did too to continue to fish also, which really makes the decision to cap fish one can catch pointless.
All the cap makes, nay, forces us to do, is to spend money to buy another content ID, in order to enjoy this aspect of gameplay.