If you're going to argue about removing Shield Bash from the GCD, it might end up forcing teams to readjust tactics. For example, almost every T5 team relies on the spammable Shield Bash, for up to 10 seconds of stuns on the Dreadknight.

Yoshi-P looks like he would not want players to change their strats. Evidence is how he brought Warriors up to Paladin levels for 2.1, instead of bringing down the effectiveness of Paladins, because there are groups that ran 2 Paladins to clear T4 (which he then said he was not expecting people to easily clear T4 at the time). Or how he reverted the last T5 change where Twintania targeted the second highest in the aggro list, if the main tank went inside a Conflagration during Phase 2, because there are groups which rely on the tank going in the Conflagration any time it is up.

I can live with it not interrupting your combo. I also once thought it was dumb it was on the GCD (back when I was Level 20 or so), but since then I've now grown to appreciate what I can do with it.