Since the iPhone has had haptic feedback since the iPhone 7 (and there are a few games that have used the feature) I was thinking it would be great if the next generation of mfi controllers included haptic feedback motors as well since I do find I miss rumble in the controller compared to playing on a console Obviously this would need Apple to update their very strict requirements on what is and isn't allowed with mfi controllers (I remember for example that clickable sticks were strictly not allowed), but I could see it as being a real benefit and if supported in apples API, quite easy for developers to implement