Bit confused here cause making everything the same gives us..variety? Those are kinda mutually exclusive, unless the variety were talking about is whether someone is using a an Axe or sword and shield. But thats not variety at that point - thats just glamour.
Now yeah, the more diversified the classes were, teh more that meta's mattered. But a lot of this stemmed from them focusing to hard on class synergy and a few skills which were to strong (looking at you Trick Attack). Theyve done a decent job addressing some of this by tweaking how some skills functioned.
The other issue is class design. You see, the devs fixed the unique issue by essentially making classes function the same in both playstyle and numbers. This was a mistake. Meta, at the end of the day, boiled down to DPS output. What was the most optimal dps group. So to fix the numbers issue it shouldve focused on tweaking potencies.
But they went further than that and made classes play similar to one another as well. The formula for WAR, DRK, and PLD is pretty straight forward - build up gauge/meter as needed, then press a CD and spam a GCD 5 or so times. Holy Light, Blood Spiller, and Fell Cleave are all this mechanic. It does the job, but its just so damned boring and uninteresting. These classes lose their identity and interesting nature.
But if you look at our shiny new tank, the GNB, it doesnt play like that. There is no "Pop CD and Spam this 5 times in a row" mechanic. You manage dots, an alternate Combo, burst damage, a damage buff to fit all together nicely, along with a bit more complex CDs. It feels different, plays different, and is fun. Why in hells name cant we have this same kind of intricate design for War, PLD, and DRK. You want a tank that can do a burst phase? Fine. Make that War. Stop forcing the other tanks to have the same design philosophy.
Btw, they havent gotten rid of 'meta'. The meta is just broader now - two melee dps, two ranged dps, tanks nad healers shouldnt be the same class with the exception of WHM. Hell they havent gotten rid of synergy either. DRK and WHM synergize to much cause of LD and Bene.