I think it would be cool and tactically efficient to have different formations for your squad to be in. Here are some that the US Army used:
Open Column
Closed Column
Skirmish Line
Wedge
Diamond
The Germans, from my understanding, seem to march in a column that turns into a skirmish line upon contact. The Americans and the Russians would do the same with their formations.
Also I’d add an option to make your own formation like in some RPG games. It probably won’t happen but it would be nice.
[charges the objective in d!ck formation]