I think the little bit of extra zoom independent gives you could be beneficial, usually I tend to prefer affected since the zoom can be a little jarring however I feel like the game is slow paced enough that it isn't really an issue. The ads time is so slow anyhow that you're not going between hipfire and ads as much as in previous games.
I've been playing a lot of gunfight so I've been using independent since I feel it's easier to get headshots with weapons like the ironsight k98 although I'll probably be going back and forth a bit before I can make a final decision.