Kruber has a few decent melee weapons, at least in my experience. The halberd is definitely good at everything, but different weapons excel in different areas.
2h hammer can be devastating, and like Cornbane it is my preferred choice most of the time. It’s devastating against hordes and single targets; the only thing it doesn’t do very well is boss fighting. But that’s what teammates are for!
2h sword is great fun, and is actually pretty good as Mercenary. It seems to benefit the most from his passives out of every other Kruber weapon, and it can tear through hordes and elites if used right. Just like the 2h hammer, its main weakness is boss damage. I don’t really see a reason to use this weapon as Huntsman or Foot Knight though, because the Mercenary passives are what make it shine. Not sure how to go about changing that without making the weapon OP.
1h sword can be ok as Huntsman. It’s one of the safest ways to deal with hordes of Skaven (which is what I have the most trouble with as Huntsman) but suffers against most anything else, at least compared to his other weapons.
I’ve never really seen a use for the other melee weapons in Kruber’s kit, but that could just be my own personal playstyles and whatnot. I have nothing against weapon buffs though! I also think the halberd could be nerfed a little bit, as it’s just too easy to use and effective for any possible situation, much like the falchion was before. Just making it a tad slower would keep the versatility of the weapon intact, while also making it each swing more of a weighted decision like most other weapons in the game.