Unhealthy factors that should be toned in preseason
Tons of slow(frozen mellet, frozen gaunlet, rylais) that also provides damage.
%max/missing hp damage
Armor pen on every ad item.
Overwhelming amount of CDR.
Free power from keystone.
Invulnerability/untergetability(Kindred Taric Ekko Kled Malzahar bard tahmkench)
Overloaded damage(buffed damage on most ad and ap items)
All I want to see is teamfights decided by better initiation and coordination, instead of which carry oneshots the enemy carry first.