I guess people don’t comprehend the fact that those added features like dishing advantage will highly impact advantage based classes that are not currently in the game, like barbarians & If xanathars get released at some point samurai. Also, there are crowd control spells like Fear will also be highly affected as the advantage effect will not be as good.
The majority of the folks here that are supporting Larians decisions in regard that flavor homebrew rules simply can’t see the future ahead and actually capture the picture that a minor change in the rules will lead to a snowball effect that in the end gonna alter the whole DnD mechanics.