Update on the bugs:
A. Gunpowder weapons. I forgot to mention that firearms shouldn't be reloaded while walking. It makes no sense and is extremely non-historical. Those weapons were very heavy and difficult to reload. They actually needed a gun rest to fire (non existant in game for logical programming problems, I assume) and a still spot to reload (which made the gunners very vulnerable, for obvious reasons). I have found that many troops, like portuguese sharpshooters and musketeers, and spanish musketeers, fire and reload while running backwards, which gives the gunners a very unfair advantage, totally unrealistic and taking out all historical immersion. As I exposed before, gunpowder weapons are already quite OP, this is not necessary, and is very unbalancing. The crossbows for example cannot be loaded while moving either.
A different approach may be done for pistols. Realistically they shouldn't be loaded on the move: loading a muzzle loader pistol is already a complicated issue being still (wrong loading may provoke the barrel to get blocked and a weapon explosion. Not to mention that you absolutely need a loading ramrod to load the weapon: if you lost the ramrod because it fell, because everything moves when doing something on the run, your weapon became a very expensive club), loading it on the move is quite a nightmare. But I souldn't press that further because you can load them on horseback, and is not easy neither. So I think that loading pistols while moving could give the pistols the 'edge' they need over large firearms on certain occasions.