Today I managed to come up with a concept for a great sword that uses two parallel handles for more effective use.
Though the benefits are clear I'll mention that you should notice how the dual handled great sword is easier to wield, strike with, and sheath. Something that's a bit harder to see at first is that the dual handled great sword actually has a lower mass than a regular great sword.
Surely if the knights of yesterday thought of something like this. we'd be calling them knights of today.
I also made this thing I have no intention of pursuing.