As a long time Viktor player, I like Viktor for his burst and his mechanics. Please dont change it. If youre going to change him at all his Augments need work and his force field.
In my opinion: Q's shield needs to be a wee bit longer than it actually is. W is just unreliable. E is fine the way it is. (Invisible lasers dont really bother me since i know where they're going, but from a new Viktor's perspective, it should be fixed). R is fine the way it is, maybe a little speed increase.
Augments need work. If it turns into late game, Viktor will lose. His best augment (death) just doesnt put out enough for late game. With a full build, Viktor is behind atleast 100 AP compared to a normal pure/burst AP build BECAUSE of his augment. There needs to be a way to upgrade it. A way so you can upgrade it late game and not early game so you cant rush it and call it a gg for the other team.
There's also no reason for the player to pick any other augment, except maybe Gravity if your team is lacking CC.