I would not call it one button rotation but I think they should give us the "OPTION" to layer mutliple buttons over each other so that players can choose a layout that reduced button bloat, and set it up in a way they like.
I think this could if some one invested time into setting there hotbar up in this way, make the game more accesible to people with limitations, without having to dumb down the gameplay itself.

But as we all learn the Devs do not like giving us options, we all get served the same slope and have to like it.