"Single Player Observer Mode" I wasn't able to start a game with someone but in the MP lobby the host can also make himself an observer too, which if it works will be good for tournaments and people trying to help/coach people.
Supply Lines Game Option Wasn't expecting to see this yet but great to see. I have a friend who was put off the game because it had to be linked, hopefully can get them to join in with the group now. People can play more like Supcom now if that is their wish, should mix up custom games nicely.
Unranked Match Again nice, I've wanted a more relaxed 1v1 every now and then, and also have sometimes wanted to go do more ranked but have been rusty on 1v1 play so put me off a bit. Hopefully this doesn't reduce ranked players but encourages more people to try it. I can see that you are probably using it as a testing ground to see how 2v2 might go in the future.
All the fixes good to see of course, especially crashes, and nice to see the matchmaker connection issue fixed now.
Good stuff. Will the map balance and unit balance submitted by Callum also be going into this update?