The Easy Way to Fix League
=General Game=
Needs to be slower with more threatening turrets. Make mana and resources actually mean something Make CDR less available and harder to build Flat 10% Damage Reduction on every source of damage item in the game Revert Runes Reforged
=Assassins= Nerf mobility - Make them pay something or do something for their mobility
=^=Mages=^= Make high CC mages unable to spam CC endlessly
=^=Tanks=^= Increase durability/decrease damage
=^=ADC=^= Reduce "one shot" abilities like Vayne's Q and reduce damage but with higher DPS potential over time
=^=Support=^= Nerf/rework problem supports like Pyke to add more counterplay
Simple... I've just solved League. Everyone bites the bullet, everyone loses something, completely fair.
. It has 20% cdr. Lets remove it, how will you compensate it? Add more mana...wait, you want mana to actually mean something, so that 600 mana is already too much.
You also can't just nerf it without compensation, because eveyone will just move to another
item
So you either add more AP(that will be a buff to oneshot meta), buff its passive(same) or reduce its cost(so people will get their 90 AP item earlier, which means again buff to oneshot meta)
,
etc
and
can spam their CC, and its soft CC in both cases.
Spamming your 10+sec cd skillshot hard cc will result in you being killed