Observer mode needs to let people stay and chat afterwards and leave when ready, or let them stay at least 30 seconds or more before being kicked out. It ends way too abruptly
Instead of somewhat random games, some kind of setup more like football or other TV sports could also be real nice. Where everyone sees the same game, at the same time, and can talk about it later. "Did you see the game? xXxX totally got pwn3d." I can be more specific if I need to?
Been hoping for an observer mode since WPE, this is pretty cool :D
Edit, few more:
If it's not already so, don't show matches with henchmen (or rather, no matches where there are not at least 2 teams with all human players)? Just an idea
Some way to make sure you come in at the start of a match? Maybe during the 15 minutes allow people to prejoin for when it starts actually showing, or something?
An option (or default) to go to another game instead of quitting observer mode. I saw somebody say something about that, and it might be nice for showing GW off in a store shop or something (watching hands-free, eating, etc)...
A lot of people keep talking about betting, probably not a good idea, but I thought I'd mention it