But the examples above are consolidations of corresponding mutually exclusive abilities. There isn't a choice to be made (excepting, strictly speaking, in the case of Enochian, which could be reapplied for no reason -- but Fire IV and Blizzard IV are still mutually exclusive).

One cannot tell Garuda-egi to execute Crimson Cyclone; so why shouldn't the Crimson Cyclone button just become the Shockwave button? (Funnily enough, this would leave the SMN open to make the usually-wrong decision to use Shockwave.)

When we start consolidating combos, we limit the ability for people to make wrong decisions, and really, what game is worth playing if the game makes the right decision for the player before the player even decides what the right decision should be? Yeah, we often complain about people who make the wrong decisions. But as long as those wrong decisions don't make the game unreasonably difficult for everyone else, the answer should be teaching them how to make the right decisions, not taking away their ability to decide altogether.