The new talent system has meant a lot of button bloat for many specs. Don't get me wrong, i really like the new system, but i think that they should try to use more modern solutions for certain things to avoid adding more abilties or more CD's if possible.
I believe that a talent that morphs or enhances a main CD is better than a talent that adds a new CD.
Likewise a talent that changes a rotation by replacing one existing ability or the interactions between abilities is better than adding more abilities.
I'm not saying that there is no room for adding more buttons to a rotation but this should require some consistency across the game and right now there is a lot of disparity, specs with short rotations performing great, specs that have a bunch of buttons to press and stuff to track barely being competitive; specs having to choose between aoe or single target and specs that have enough tools to perform really well in both areas with no changes.
What i'm saying is that for the new talent system to work for more than one expansion, they'll have streamline a lot of rotations in the future and start using smarter solutions to give diverse gameplay choices that are able to capture what makes those specs fun without having to reach that point by adding more and more stuff.