There are already all ideas.
Option to show a number in Gallery view in a corner of each participant video (maybe also an option to only show 9 participants, or next gallery page will just go 9 participants further).
Then a shortcut with numbers 1-9
And a setting if this toggles spotlight for the person (add/remove to spotlight), or replace currently spotlighted person(s). A number would be nice for max parallel spotlights (for participants) and an option to always keep hosts/cohosts spotlighted.
Then in a class i could press one button to add a participant as second spotlight. Later either same button to remove participant again, or different number to add another participant. After adding 2 participants or maybe 4, whenever adding another participant, the oldest spotlighted participant should be removed.
And finally a button to turn off all spotlights except for hosts, and I would be 120% happy.
Since the ideas of what could be done are greatly varying, a more flexible solution would be some kind of scripting for hotkeys. To connect multiple commands with a button.
This would also be wonderful to press a button at the end of class to…
Unmute own mic, allow participants to unmute, send request to unmute to all participants.