The Witcher 3 downgrade wasn't pretty either.
ME3 ending therapy is useless, they first have to admit they have a problem.
I didn't follow TW3 pre launch, beyond eagerly tracking the release date, so I wasn't privy to the "downgrade" issue at release. Plus, I play on PS4, so I probably wasn't victimized like the PC crowd was.
As to the MEA team admitting the ME3 ending problem, Aaryn Flynn actually specifically called it out as the hardest lesson he'd learned in his career, but an extremely valuable one. He said improving upon what happened was a driving force for him with MEA.
Mac Walters also admitted a need to improve upon the endings, but did it in a petulant sort of way, like a preemptive confrontation.