There’s a lot of stuff that needs to be done to make many melee weapons viable as only a couple really are worth using but right now I’ll I want to do is add a suggestion to make the executioner sword viable. Right now the major strength of the weapon is its heavy attack, as it should be, but the problem is the extremely slow attack paired with the very low mobility with the weapon and short reach. Your movement slows and you don’t really get any speed boost when doing the charge like you do with many other melee weapons, and it means that you have to stand in melee range extremely vulnerable while you use it and there just are very few opportunities to do so without getting hit, voiding its major strength and any reason to use it.
All it really needs is just less of a movement penalty while doing to the heavy attack and/or a short dash forward while it’s swinging down, it’d make it very viable and actually pretty damn fun. I’d also argue that because the heft of the thing, it should have some armor piercing on its light attacks because the thing’s pretty much a giant falchion, But that’s not as important.