I have to agree with the OP on this. Leveling every class to 50 does not require skill, just time. The fact that someone will become a much stronger class simply based on their free time is ridiculous. They should have advantages over other players, but not to such a degree that it can overshadow actual skill.

I'm hoping that alot of higher tier abilities are made class specific, much like we've started to see with con. FFXI did this with it's sub-job system (preventing use of any sub job abilities past 37) and it worked great.

Adding other classes abilities should suppliment your current skill, not define you. And it should definately not make you better simply because you had the time to rank up more than someone with a life.