Suggestion for the server video calls

I think it would be nice if you could change the size of each individual screen if a lot of people have theire camera on or share theire screen in a call. 
Or disable the screen of the person. Im aware that there is a option for disabling video but there is still the user iscon with a fat background. 
For example if you are in a call with 2 other people you can make 2 screens big and rest is gone or smth like that. 

I hope that it can be a thing in the future. 

Your friendly pigeon