Champion diversity
Im going to bring 2. examples.
Situation A: Lux meets Zed in Zeds own jungle. None of Lux' allies are anywhere nearby, while Morgana is a stones throw distance away from Zed homing in. Lux also does not have stopwatch yet, only Ludens and Rabadon. You know what probably happens.
Situation B: An extended faceoff 5v5 Midlane. Lasts a while. Before any engagement, Lux hits 3 spells from a safe distance, 2 of them hitting Zed and reducing his HP by half.
With that in mind, the worst thing that can be done for the diversity of the game are: 1# Increase Lux's survivability in the heat, so she can may be get away from Zed in Siutation A and escape 2# Give Zed the option to contribute during the faceoff or dodge Lux's spells.
Discuss
Im posting this because some people want exactly the opposite in the name of "balance"