Its ffxiv combat really so slow and boring?

[MomomiMomi]

Edit / Aside: I'd actually be a lot more interested in your idea if it did do more to gimp the full effectiveness of various combos (for example, by not allowing oGCD weaving). I think there's an argument to be made for a 'training wheels' sort of mode that allows anyone to hit a certain level of performance in a relatively mindless fashion, but that also restricts them from ever achieving higher levels of performance.

We already have this. They're called macros.

For the rest of your post, I think you're overestimating any performance increase from changing 1-2-3 to 1-1-1. You still have to press the buttons, and you still have to press oGCDs in between them. You can still make mistakes by pressing the wrong combo button when starting a new combo; I even do this myself once in a while in PvP.

Anyway, the whole thing isn't a huge deal to me as long as I stick to certain jobs. I simply don't play the jobs I find unfun to play because they have too many redundant abilities/buttons. I don't have too much trouble sticking to only a few jobs, or even just one if I had to.