For a lot of the abilities in this game there's really no reason for them to be different buttons. That kind of bloat isn't complexity or challenge; it's just inconvenience for the sake of inconvenience.

It's like if they made opening character menu require you to press ctrl+alt+shift+c instead of just c. That's not more intricate, complex gameplay that really separates the men from the boys; it's just making something more inconvenient for no reason.