Then you are using the wrong talents for button mashing. With all the short-mid duration cooldowns and MC procs, I think I'm back to about as many as MoP. I was certainly scratching my head over binds, and immediately got my old Naga out for extra space.
These are usually simmed undertuned, because they tend to work better in non-patchwork scenarios where you can make use of burst windows while you regenerate during downtime.