Why was this advertised like it was a good thing? Did they just no realize that Benis was shit at that point?

I just noticed it. The things he introduces to both the Big 2 - gay Iceman, aged up Jon Kent, whoever - the decisions are never allowed to be undone even though the revolving door of disrespectful writers has retconned away bigger peoples' work for less. Why him? Why are the things he puts in considered sacrosanct well after he leaves a company?