IIRC this was handled better in the first MTW. But in M2TW, there isn't really any coordination, with one exception - crossing bridges. (IE, in my experience, when you and the opponent are on opposite sides of a bridge in the campaign map, it'll always be that way in the battle map.) Of course, that's one incredibly important strategic placement scenario.

Otherwise in many battlemaps, the AI often does not make the first move. (I'm talking about situations where it's not a given, such as if they try to break a seige.) So I just crank the speed up to x6 and move around to the best position possible. Then go to x1 and have fun.

This may be because I play cautiously and always try to keep stacks equal to or greater than other (potential) enemy stacks nearby.