You realize that line of argument, if not useless to begin with, became so when you said "wasted"?
In any case: There's a fundamental difference between ruining an element of the game and adding content that supports a given playstyle.
And, in any case, there's literally no argument for AC switching that doesn't fall apart on the fact that classes are not a thing to be changed (that's just the nature of them), and the fact that with any other game, you'd need to reroll.