I voted 1.7(but i can't remember if it should have been 1.
... I liked it when Availability was in the game, I disliked the supply system but worked with it. I liked that matches weren't won on simple stalling and bleeding your opponent out, and actually took skill to win rather then underhanded easy draw it out tactics. (MCP killed this style until we got bastion, BALANCED map that destroys MCP, and is the reason it is quickly becoming the most played map)
I liked that i was always able to play the game, even if the offensive went badly, i could always field forces to actually play my full army. (MCP popcap reduction destroyed this)
I liked that i could attack or defend in the same day, although I do like not being able to choose which i get to do.
I like where the balance is at right now, the game units are more balanced in my mind, the gameplay sucks comparably.