Nexus and Inhibitors.

[No this is not my first account] Idea: 3 Inhibitors up: Nexus is Invunerable and heals at normal speed. 2 Inhibitors up: Takes 66% reduced damage, heals at 2/3 speed. 1 Inhibitor up: Takes 33% reduced damage, heals 1/3 speed. 0 Inhibitors up: Does not reduce damage, does not heal.

This would stop the "Force 1 lane down their throats to win" and a more spread out game.