Group Call - Having the capability to adjust the view

It would be nice to have the capability to adjust the view of each screen. In our clinic we hold a pre-baby meet and greet class with multiple providers and expecting parents and it would be nice to have more than one provider large and centered or have it where whom ever is speaking be the larger view.

It would also be helpful to be able to mute the entire group rather than each individual participant and have the capability to un-mute them as well.