Allow swords/axes to block using the LMB since it does nothing. Allow them to block both melee weapons and bayonet lunges (maybe bayonet charges too?).
This will make swords/axes more valuable, intricate when being used, and overall more fun.
Not just swords and axes could be updated, but shovels as well, each thing with their own use.
Swords:
Allow for melee blocking
Axes:
Allow a wider swing that may do less damage, but would hit a wider area.
(Additionally, allow axes to chop down trees. This is to help with sight lines.)
Shovels:
Not melee combat, but allow dirt to be ADDED to a location to help fill in holes or smooth an area out.