Don't know if steam was the right place to suggest this feature, so let's share it here as well :
Maybe it was already considered, but could a simple observer/Spectator mode be implemented at some point?
For example, many people like to watch, ingame (in single player skirmish mode), a simple 1vs1 with AIs. to gauge the strenghs and weaknesses of different AIs, observe some build orders and see some good fights or study the maps and the groups behaviours while they quietly take their coffee!
Before training and moving to the multiplayer part of course.
It could be quite simple to implement this feature, isn't it?
Thank you and have a good day.
(sry for the typos, the copy-paste from steam looks odd)