The block and mute features are very useful features. However, when you want to hear and see a player but their avatar is too performance heavy, has annoying props, animations, music, emissions, etc, I think you should be able to block/hide their avatar. I think, because you aren't blocking them entirely, There should be a blank or default avatar (such as the red, transparent, unity-bot avatar) that you will see as their avatar instead. That way you can still hear them, and have a visual representation of them. I have, and I bet many others have too, come across many situations where this would be useful.

TL,DR: Suggestion for the ability to hide an annoying avatar with a process similar to the block/mute function, that replaces the avatar, only in your POV, with a default avatar. That way you can still talk to, and see the avatar of the player.