I think this is a big part of why I personally love the seated missionary angle like the one used in the recent Mackenzie + Violet scene. To me eyes it seems like the perfect balance of being close face-to-face while still showing a realistic body position and visible insertion for the viewer.
But I agree that there's some room for improvement with the missionary angle. The Tru Kait + Kenzie Anne scene was definitely much more obvious than I remember ever seeing before. As long as you were looking at the girls faces you were fine, but the second you looked down it was pretty clear.