One thing I've noticed while skirmishing is that there are times my musket - or part of it - clips through a rock or a tree or a wall and this seems to stop the bullet if I fire causing a "strike" to register on the object the weapon is clipping through. This can be very frustrating given the slow reload times (not complaining about those though!).
I would love to have some sort of visual warning that the weapon is clipping through something if not an outright inability for something like that to occur (a visual warning like "weapon blocked" or something more complex in the animations like you won't level your musket or it's clearly askew or something).
It's not a major thing but it's a definite QOL improvement!