I am not sure they will implement feats honestly. It can be hellish to balance in a video game. So far, they haven't talked about these at all. So I assume they won't be in the game.
I don't know if all feats will be in the game, but I am certain that Larian is working hard on getting them in. It is possible that certain feats might require a minimum of level 4 though, because they might be considered too powerful.
