In my opinion the issue that plagues this game is the controls - not the graphics; I don't think it was ever supposed to look as good as say Call Of Duty 5.
The controls could really be improved and this would make the ge much ore satisfying to play. I suggest several improvements below, each in its own paragraph.
Moving the terrain.
This seems to happen a lot by accident. Perhaps eliminate the moving of the map with one finger. This might prevent the map spinning all over the place.
It's hard to see the lie of the land. Perhaps you could use tilt sensors to change the elevation?
More zoom would allow more precise control on smaller screens.
Moving a unit
Dragging a path is great. Making the troops face the right way is terrible! Perhaps you could tap a unit to select it, which would bring up a display of additional controls: left and right or a target reticle. Or, when troops are "clearly" selected perhaps they could have pan and turn handles to get them quickly aligned and oriented.
Making troops fire
A target reticle would allow the clear selection of which troops to follow and the direction they face could dictate which ground to cover. For newbies it'd be great if the game gave some clues like "not yet in range" or "not in sight" if they are behind a hill.
Layout of controls in lobby screen is also quite terrible on a small screen - they overlap!
Perhaps an initial menu could be created: tutorial, single player practice, online multiplayer.