I'm surprised you're a fan of advance wars and you don't like this!
I'm aso an advance wars fan and played Dark Conflict before I got this. I think there are obviously a lot of similarities and having played advance wars, it gave me some idea of which units to use etc.
It sounds to me like you were expecitng/hoping for a much larger RTS with lots more units and a bigger playing field. I just don't see how that could work with Batallion wars, due to you being on the battlefield. The only way to control a whole army on a big map would be from afar in the birdseye perspective, which would just make BW another run of the mill RTS.
I'll agree that the Wii should have that kind of game as it's controls are almost identical to using a mouse, but for BW I think the action needs to be loacalised, otherwise you would have no idea what's happening on one side of the battlefield!
I don't see how a retreat option would help either?

You have to destroy what's in front of you to progress, so the emphasis is on forward planning, not running away and coming back another day
