1. We still don't share a common digital space when having meetings, because everyone sees tiles in a different order. "Let's go around the table and give our updates!" Uh, in what order? There is a lot of power in the subtle social cues available when everyone knows who you are talking (or listening) to by shifting towards them.
2. There's still no effective way to non-verbally signal that someone wants to speak. If everyone was push-to-talk, then holding down the unmute button would let the UI emphasize your tile and signal to others. This would cut down on verbally stepping on each other. Nobody uses those "raise hand" buttons, because they are too single-purpose and relatively high effort.
3. Often, there's no way to tell at a glance if you're muted. I can't believe Zoom still does this: you have to move your mouse to get it to show you the UI. Why are you hiding the UI.
4. What is the point of reactions appearing on your own tile? You're not talking: nobody is looking at you. Reactions should appear on the tile you are reacting to!
It's small things like this that make video calls a mess, and nothing's changed since the beginning of the pandemic except for video filters.