I would love that!
In the past there were some "more accurate" Line Battles in NW were lines only was allowed to walk in double lines. They was not a long time alife as i remember...
But a system wich would force you to move more in formations also with other lines together would be a nice thing in here. For the actual NW players wich only like to "move in, shoot once and charge the hell out of them", it would be nice to make it an option wich the server can activate or deactivate, to make it more dynamic (as you said).
Whats about an stamina bar wich goes down every time you beat in melee, run arround or you hold to aim (after 5 minutes to aim everybodys arm would fall off). Stamina would regenerate slow, and faster near an officer or dummer / piper.