Reading the Lasalle Forum it quickly becomes clear that a common game tactic is to mass Attack Columns against defending Lines. That in turn means that defenders abandon Line and commonly deploy in Attack Column themselves.
The problem with all of this is that is completely unhistorical. Historically Attack Columns were expected to deploy into Line when they got to musketry range so left enough room between units to allow this.
Personally I find the unhistorical sight of massed Attack Columns offensive and I want a game mechanism to prevent or discourage it. The Lasalle Forum has a bunch of suggestions which I thought I’d list here.