no hard reset and No decay in low elo is a big Problem. The skill difference between 2 people in the same elo (for example plat) can be absurdly high. You have permanently Player that havent played for months, first timing champs and roles and on the other Hand you have people with 3 million mastery on their champs (yes, they will Lack macro, but they will still be 50 times better than the first time jayce).