So i noted that the halberd doesnt seem to cleave enemies as it is supposed to during a run today. I was playing merc with limb - splitter but i still could not cleave beyond a single mauler/raider with a heavy sweep.
Meanwhile the elven dual swords have inferior cleave numbers but they do hit 2 maulers per heavy attack even without any merc passives or talents.
I also noted that the pushes on it seem weaker than some other weapons i used, i had a stormvermin infront with 1 slaverat inside/behind him plus a few extra around. My push did stagger the big rat but little one was completely unaffected.
That´s not how i recall that being supposed to work and so i suspect something is not quite working as intended. I did not have these problems when using bretty sword on GK.