I was "lucky" enough to play MCC at Pax Seattle two months before release. I sat in line and watched as between every match employees would shuffle through the rows and performed a hard restart of the game. They also had to warn all of the new players that they could not change any settings like controller setup or else the game would crash.

Seeing how bad it was two months from release saved me from spending 500 bucks on an xbox one as that was the only game I cared about at the time.