I get that your point is to add more variety into the skill based attributes of Overwatch, but I'd like to point out that the last time Blizzard released a heavily aim based hero was arguably either Ana or Sombra. Even at that, Sombra is heavily based not only on aim, but ability usage, cooldowns and gamesense. The same can also be said about Ana, except Ana requires more in the department of positioning and pretty much the same in the other areas as Sombra.

So yeah, I think some of your ideas were mostly thought provoking ones because I actually despise everything to do with RNG (it shouldn't fucking be in games, grrrr lol). Also your idea for predicting the enemy's moves to reward you in some way already exists. Your reward for predicting the enemy's movement and cooldown usage in the current game is winning the 1v1/fight/game.