Forgive me if I have missed a similar thread (though I have looked). The ability to load while moving would drastically increase the realism and historical detail of this game. Here are the reasons why.
1. As a reenactor, I find my self loading on the move more often than loading while static.
2. the inability to load while moving decreases realism because unless a person stops the loading sequence, then move, and then load again. This is very incovenient when a player has to respond to a new threat.
3. Loading while moving would make moving in line formations much easier since officers would not have to ensure that everyone is loaded before ordering a formation to move again. This would also make formations a more sound tactical choice because as of right now, the formation cant move until everyone is loaded, costing valuable time.

I hope this helps, I'd be happy to help with historical advice etc. Thank you WoR for the hard work.