Tried it. Nice little game, but lacks variety for now - I just did "shoot, shoot, pikes, repeat", and it pretty much worked.
Needs a little bit more spice to be viable as a standalone game - the thing North & South's battle system had is it was just part of a bigger whole, so it didn't need to be super-engaging on its own. You don't have that luxury, so try to build on what you have - maybe a "build your unit" mechanic where you buy stuff, enemies that challenge you in different ways, more types of units you can use in your own formation?
Enjoyable overall, but only for a few minutes.