Each expansion I get hyped and also worried about more skills.

[Bright-Flower]

I'm in favor of the button prune like consolidating ABC combos, but most players seem to consider having more different buttons to press "deep".

It depends on the job. Dragoon, paladin and ninja etc, you could easily prune down the linear combos.

Monk on the other hand, not so much because of perfect balance which lets you hit any combo skill. I think SAM has something similar? So these two jobs have mechanics you'd have to strip away in order to do this.