I don't know about you, but I do kinda miss grinding jobs up to 75, playing my job, and learning how to play. It was repetitive and infuriating at times, but it reinforced the use of the job and n00bs, though they still existed, were hard to create. You had to really work at being a n00b.
Now all one has to do is level to 30 then pay a fell cleaver 300k gill to power level them to 99. As a result, our game is flooded with n00bs power leveled mostly by RMT's and the basic xp system is meaningless.
But I have an idea. Change the way xp is attained by relating it to the effort you contribute to the fight, such as how much damage you've done, how much hp you healed your party, and how many buffs/debuffs you put on/take off. This would force everyone to engage in the fight. Hmmm... This sounds familiar... Campaign! Implement the same xp mechanism in campaign for regular xp. This would force n00bs to go play their jobs if they want decent xp.
Like this post if you agree so the devs will take notice.