I'm sorry to sour the mood, but I'm not seeing "90% of the fixes" in Lamannia. I'm only seeing 2 issues fixed (Metalline Bond was just a display issue), and 4 still bugged.
Fixed:
1) Laughter - Last time I tested this it wasn't only the Melee Power not applying properly - the enhancement wasn't granting ANY Fury stacks at all, regardless of whether Slaughter hit or critically hit. I'm assuming these portions of the enhancement are fixed too, otherwise it remains utterly broken.
2) Mutillate (hopefully the Bane damage scales as advertised)
Not Fixed:
1) Festering Wound (does absolutely nothing)
2) Dismember (does absolutely nothing)
3) Hate (doesn't generate extra Threat, taking OP's word for it, haven't personally tested this - I do see mention of "Threat" in the combat log, but it may very well be bugged indeed)
4) Knockout (Ear Smash's upgrade in Occult Slayer): It's supposed to be putting enemies to sleep for 6/12/18 seconds, but in reality they are only CC'd for 1-2 seconds. The "On Vorpal, enemies are stunned instead" portion of the ability functions correctly.
No idea if Slaughter's +[W] are actually fixed either. Tested Slaughter just now, its +[W] work fine.
Maybe we should put off celebrating until things are actually working?