I loved jumping puzzles in Guild Wars 2. Yes, some of them were incredibly challenging, but I don't understand quitting GW2 over the jumping puzzles since they're entirely optional content. Rarely did I find the challenge was because of clunkiness with the system. The non-optional encounters that had jumping in them were simple obstacles to jump over and didn't require any degree of skill or luck to bypass.

That said, jumping puzzles will not work in FFXIV, even as completely optional content. Jumping in this game has so little control that puzzles would be nothing more than an exercise in frustration. At least in GW2 you had control over your character's direction and placement while in the air. In this game once you've jumped that's it. If they changed ARR to allow more control over your jump, then I could see it working.