A thought about Backstab.

I think it was something we should keep, as it is really a thing in real life too, and other games.
However, it would be nice, if you could only backstab a character if you were already behind that character (maximally 2 meters away) before the start of your turn.

I am not sure how difficult it would be to implement this, but I think this way you could still gain advantage by backstabbing someone, yet you would really need to plan for it, so it would be actually something rare in the game.