Well, secession is not mm and doesnt want to be mm.
I see lot of line battles in secession with recon units, like the cavalry scout the positions and report them to the infantry.
Crouching is mostly allowed, even to form small spaces between your ranks and form small skirmishing lines.
Civil war warfare is quite different then napoleonic warfare (well, some tactics were still used, but the use of terrain was more important).
Also, the line battles are played on maps which feature lot of cover, fences and walls.. which can be used.
Well, I did not join a line battle since 4 weeks now but the line battle rules in the last months were very nice and offered lot of fun. So why do we get a compare with mm line battles again?