I didn't play all that much ksp 1 (only 48 hours), and I never got to the point of building commnets, but I think it would be really cool to have object occlusion and the differentiation between relay and antenna types you mentioned. It would be a shame if the devs didn't add those features in ksp 2 because I'm really enjoying it after the For Science! update(I've already played 122 hours!).