So there are quite a few things I think spectators could benefit from
In-world Chat graphics
Above bunnies heads would appear any chat lines that they have said (in green by default) as well as whispered text. (even if the spectator is out of range) Only the last message sent from that bunny would be displayed, as chat-stacks are ugly
Additionally, when a bunny is speaking through microphone chat, place a speaker icon above their heads too.
Shortcut Keys
The number keys used for the buy menu could be recycled to teleport to different locations. i.e:
1 - View the whole map (default)
2 - View the game through Robo's eyes (cycling through them if there's more than one)
3 - Teleport to and cycle through bunnies
4 - Teleport to dropship and back
5 - Teleport to (and cycle through) feed boxes
6 - Teleport to (and cycle through) power plants