Honestly I'm not seeing it. All I see when I think of what is being suggested is the current state of WoW's skill bar wherein all skills can fit on a single toolbar and requires no thought to use. The game literally becomes nothing more than [Press 1 - use oGCD - Press 1 - use oGCD - Press 1 - any oGCD off cooldown? If yes: use oGCD, If no: Wait for GCD - press 1 - Repeat] which is the main reason, paired with an over-arching lack of challenge to the game, why I, and many others based on many threads on the forums, left the game.
Pruning of abilities is something that can destroy the fun of combat for those of us who actually like having buttons to press instead of mashing one button to win.
Allow me to finish by linking an article regarding WoW and their revelation on the over-pruning of abilities in their game:
https://massivelyop.com/2019/06/22/b...-gone-too-far/
At this point I will concede that I will neither sway your opinion nor will my opinion be swayed on the matter and any further continuation of this line of discussion is going to be very cyclic in nature.
I respectfully disagree with your opinion and believe that the idea of pruning abilities beyond what has already been done with the changes brought about in Shadowbringers is not what the game needs.