Balance does not need to be shifted away from anything, or you risk hurting the good champions that have counterplay, are different, and are fun.
Viktor is one of these, very healthy champion.
Lux is another good example of a healthy burst mage.
Pick and win rates are not necessarily important stats, it's stuff like "Damage dealt to champions" and "Damage Taken" and what teams she is being picked on/for that tend to help out Riot when decided how to balance things.
There is always a way to outplay a champion who can 100 to 0 you in two seconds, but you have to put effort into thinking about how you're going to do so.
For example, I am a Viktor main, and I destroy Zed now. Didn't used to. I had to invest time in thinking about how to counter his various item paths and engagement scenarios in which I come out on top.