The 2h sword is an absolute killing machine on any of Salty’s carreers and is one of my favourite picks even on BH. If you can balance out the 2h’s biggest detriment, which is killing armour (it actually isn’t THAT bad, depending on your setup, 3 to 4 heavy attack headshots still kill a stormvermin), it is a very good weapon for horde clearing, you’ll have a very easy time hitting relevant breakpoints and it even has surprisingly good boss damage. While most people shun attack speed bonus, my go to pick for 2h swords is always the “classical” “attack speed, crit chance, swift slaying” package. Folks will always say “5 to 10% attack speed is just 1 or 2 additional attacks every 20 strikes”, but that’s missing the point on 2h sword. You don’t put attack speed on it to strike more often, you do it to reduce windup on both light and heavy attacks.
But I would definitely agree it is kind of a waste on WHC (even though it is very good at hitting heads, most enemies die from headshots, anyway, due to its very high damage), it is, imho, the absolute best weapon on Zealot when paired with a good crossbow to tacke out stormvermin. With your added attack speed and crit chance from talent, swift slaying procs very often, and you become virtually immortal in hordes if you go with temp HP on hit with your active ability, as it cleaves like a mofo and kills even more, each of your strikes will more than compensate for every hit you eat. Even CW can be reasonably dealt with with your added attack speed from swift slaying and your active ability.