Sometimes we can be 100 in a room and it's hard to see who is talking, constant have to scroll up and down.

It would be useful to see somewhere a little mic icon with next to it the name of who is talking. Maybe only activate it when the current speaker isnt visible on the channel list.

Something like :
<Microphone icon> [Name of speaker], [Name of speaker2], [...]

It could be put between the chat and the channel list or maybe at the bottom of the chat.