I just finished watching a 3vs3 and observer hud is... inadequate.
1) The minimap is far too small to make out what is going on.
2) Unused buttons around minimap.
3) The whole middle section with replay controls is to tinny, I suggest make the buttons bigger and place them around minimap. As the minimap window is circular while all maps are square, so there is a lot of dead space you can cover up with buttons.
4) The player rectangles are large and blocking off a lot of the view. They should be main streamed with new design where main philosophy is "less is more". Do we need to see the bulletins when we can check them out during loading?
5) The games seemed to pause for 5-6 minutes before live broadcast can actually begin, meanwhile you have to wait and stare at frozen units. I would suggest to stop the game for observers at loading screen, but replace the bar with a countdown and once countdown is over, replace it with button like "Start watching". This way casters can look at the map, look at the player loadout and speculate over avaliable commanders and selected bulletins.
6) You can toggle selected players above the rectangle which will collapse amount of rectangles to 1. In team games with over 2 players per side it is rather difficult to see other players and the only way I can see them is by scrolling, which results in zooming.
Suggestion: Event log.
A log of events running on right or left side where actions players take is registered, similar to any chat logs, transparent background, events older than 5 minutes become transparent unless log (but can be made visible again by selecting the log, then you can also scroll up and down to view previous events, clicking on event does not select the log). Log should contain stuff like unit production, off map artillery, off map unit call ins, unit loss (aka squad wipes)... You can click on these events and be immediately taken to the location, all events should include a time stamp.
I see for me that unit production queue can be moved entirely to the log, freeing more space in the interface.
Off map unit call in looks like unit production queue except no progress bar.
It should look like: Game time stamp: player name (in player color): <Unit Icon> progress bar.
Unit wipe should look like: Time stamp: Killers name (in player color) <killed icon/unit icon with red contour> Unit owner (in player color).
Off map artillery: Time stamp: Player name (who activated ability, name displayed in player color) <Ability icon/name>
Clicking on the events leads you to event location. Adding a feature to right click on unit wipes and replay the event with -5,-10, -15 setback is also welcome. So in case if observer/caster missed event he can review how it happened.
NOTE: Player names should probably have own shader with outer stroke which can inverse color based on the background. Aka, white background = black stroke around text, dark background = white stroke around text. That's in order to make text in the log more readable.
P.S. On unrelated note, opacity slider for match maker GUI in mine menu is really cool.
Norway
Belarus
Relic Entertainment
보드카 중대 
