I suggest that we bring in a system like the Merit Point system from XI.

What are Merit Points?
Back when XI's level cap was 75, players could still collect exp after maxing a job's level and convert to Merit Points (10,000 exp = 1 Merit Point).
These Merit Points could then be traded in for improvements like stat boost or new abilities and traits or upgrades to said improvements. There was a total of 5 General Categories of improvements: HP/MP, Attributes, Combat (which was then split into Weapon Skills and Defensive Stats), Magic, and Other(Critical Hit Rate, Enmity, Spell Interruption). Each of the General Categories could be only upgraded a certain number of times, with each improvement having a max number of upgrades.
Additionally, each Job had their own unique Merits in the Job-Specific category.
The Job-Specific category was then split into two groups, Group 1 and Group 2.
Group 1 dealt with upgrading skills and traits the job already possessed, while Group 2 introduces new ones. Just like the General Categories, both Groups in the Job-Specific category could be upgraded a certain amount of times, with each improvement having a max number of upgrades.
Players could cancel any Merit Point spent but would not receive those spent points back. Additionally, a character could only carry a total of ten Merit Points on them at a time, with any new ones gained lost.

Okay but why bring them to XIV?
Well, for starters, the level cap. We already had people reach 60 during the game's early excess and more and more people are getting their main's and secondaries (and even more then that) to 60. Judging from how long it took for use to get an increase to 2.0's cap, we might have to wait til a new expansion til we get any new toys for our jobs. This is where Merit Points come in. A Merit Point system could easily introduce new skills to players with out handing it to them.

Additionally, this would add a semblance of customization to the game. There have been a vocal few who have voiced their their want for more choices in how their character/job grows, well this could help with that. Yes, I am aware that "Popular Builds" will spring up but a popular choice always comes with the ability to choose.