Do make sure you understand what you are saying.
From the very beginning, this game is not meant for specialization. Everybody and their sisters have the same skill trees and identical builds from the ground up. You want to heal better? Play WHM! You want to debuff better? There is RDM. The Specialization system is the job system in FFXI. Absolutely no different within jobs whatsoever. You might argue that the Merit system offers alternative builds that FFXI originally lack. Still, Any WAR can do do dmg as good as any other War and WHMs still healing identially good in any builds. It offers little to no different in performance that's laughable at best. And even the VW proc's system currently undermines it even further.
The current Devs are so close-minded and lack foresights that anything new and fun is considered game breaking. Any radical change to the game is prohibited due to fear of evaporate away the remaining fanboys. What I think they will do on this stage of the game is trickling in tinny content here and there with extreme timeshink. After all, they're part of a business, and a business' goal is to milk you until the end of time.