PL doesn't make bad players. Lack of motivation to learn one's role correctly creates bad players. Doesn't matter how they were leveled, they're going to be bad if they lack that motivation.

Similarly, it doesn't matter how someone is leveled because if they have the motivation to learn their role properly then they will. They will learn how to play their role properly and will be an asset to any party because of it.

I've seen people who leveled "legit" and are awful. I've seen people who were PL'd and are great. Granted, PL doesn't help the issue but it certainly does not create it.

I tell everyone I play with regularly: I don't care how you got your levels as long as you know how to play your class/job. Do that and we will have no problems.