Since when? Even analysts has said multiple times that a Bo3 demonstrates everything better than Bo1’s. It’s also been an opinion for years - not to mention that this statement basically indicates that a bad day is indicative of where a team is on a scale. I think that ruins the way ratings work.
What i dont like with this events. is that is only 1 game. its even for all but you can be lucky that you get the better map for you. ppl know that if you play vs Astralis in nuke and inferno, you wil get a hard time.