Let me start this off by saying that I love the (elf) 2h sword. I find it to be a very fun weapon which compliments my style of play. Its non-intuitive style makes it really satisfying when you pull off plays with it. It comes with a bit of a problem though: The weapon is lackluster against hordes.
I believe the root of the problem to be the weapon’s attack pattern. Light1 & Light2 are both upwards sweeps, it misses out on so much bonus head shot damage that it can feel like an uphill battle against hordes with high HP targets or playing with difficulty modifiers such as Deathwish & onslaught. Hell, even its pushstab is just an upwards swing with a higher crit chance. Without head shots, clear times are significantly slower compared to similar weapons like Kruber / Saltzpyre 2H sword.
So how do I feel the weapon could be improved? Make just one of the light attacks a downwards swing. light2 seems like a good candidate, where it would just follow the same trajectory of light1 but in reverse, maybe reduce the stagger a little bit to compensate.
It’s saddening to see so few people sharing my love for this weapon, and its one of the least used elf weapons. Changes to the weapon are hardly made because of this reason, the only time a change has happened was during the Big Balance Beta where pretty much every weapon had was changed.