Concerns about " Getting rid of unused and ineffective actions"

[Bourne_Endeavor]

To be honest though, if a series of actions all perform a single decision/action, why spend 3-4 buttons on it?

Because, at least for me, consolidating an entire combo into a single button would result in fundamentally boring combat. Perhaps I am misinterpreting your post, but do you mean to advocate Dragoon's Full Thrust or Chaos Thrust combo should be reduced to one button? If so, I would seriously have to consider whether I'd continue playing. This would reduce the entire rotation to basically five or six buttons. Having to press multiple buttons and weave oGCDs into the rotation is what makes an otherwise simplistic combat system fun. It feels good to press those 3-4 buttons. Pressing just one or two may work for action combat because the enjoyment comes from reacting to the unpredictability, but for tab-targeting, I think the opposite is the case. It just becomes boring.