There should be a compact layout option. About half of my Skype for Business screen is taken up by things I wish I could delete or make smaller. Maybe have the display be modular and give the ability to hide certain modules or make them look smaller.
Not everyone needs a huge video icon; some people still use a mouse and can make fine selections. Nor does the date need to take up 5% of the screen. Just stuff like that.
I like how easy it is to design your custom layout in adobe connect. Frustrating in S4B to only be able to share one thing at a time. I also liked being able to flip back and forth between presenter view and attendee view so I knew for sure what they were seeing vs what I was seeing.