0 games that play on controler and requires communication require as much button mashing, you keep missing this important aspect.
That's why the combat is not even close to the button mashing level of those games. Which is what you keep missing. You think this game is like the pinnacle of button mashing for the consoles, when it's not even close. The actual gameplay becomes more about reflexes and you don't have to think about what you're doing the more you keep playing and the better you get. This shouldn't be an issue in an MMORPG where everyone is supposed to play for months. Everyone can and will learn this combat system and will have no problem communicating. Even if they sped it up further.

There is simply no need to underestimate your normal console player and that is more of an insult towards that group of players than anything. "You're a console player and can't keep up, therefore we dumbed this game down for you. Enjoy."