interesting roster. Not bad

However, the thing I asked about was the minimum number of changes you could live with. And maybe this is it. Maybe not.
My thinking is this: What if Cyanide could be made to tweak the roster for BB2?
You'd have to get past Dode, who thinks the fluff is fine.
And - IMO - you'd also have to consider the people who like the current roster. So - as few tweaks as possible.
I'll list my thinking:
Like you, I like the frenzy as a negaskill concept.
I also like the super-big-guy concept.
Good start.
I can live with no mutations. Daemons rarely mutate (BB = never(?)). And Khorne isn't that big on it either. So that could Work.
IMO, the problems are:
1) I really don't like the names. Pit Fighters could just be linemen. Heralds could be Beastmen of Khorne or Khorngor. Bloodletters seem too puny. And frankly so does the Bloodthirster - I mean, a major daemon with ST5??
I'd go:
Linemen, Khorngor, Bloodletters (modified stats), Herald. A herald seems more like something that could match an ogre or troll.
2) P-access Pit Fighters feels very 'tacked on'. I agree that S-access is very appropriate for Khorne. If this becomes too much (it's a highway to block, frenzy, POMB) then perhaps these crazy Guys could be just S. No plain access to block would certainly compound the frenzy as a negatrait angle!
3) I don't like that the (current) Heralds don't have Regen. Either daemons Regen or they don't. That's one of the reasons to rename these to Khorngor.
4) Bloodletters. This is the big one. Like you, I think they really ought to be ST4. Then Again, this would also be the change most likely to change the feel of the team. I prefer ST4, but would it still be the same team?
Either way, I don't like inventing new negaskills, and I think that Garions idea to use bloodlust, while cool, kind of transgresses on the vampire team identity.
Rather than a skill like instability, I'd stick them at AV7. Heck, even 6 if they had to. Pooof - back to the Warp.
I like them reasonably agile. Even the A-skills. But maybe they ought to be no-hands then. Some people talk a lot about Bloodletters being soul-bound to their swords. Maybe they could be soul-bound to big nasty spiky gloves too?
But how to really gimp them (if they have ST4). Would Wild Animal be too restrictive?
I lot of crazy thinking. Still open to discussion. But the above could translate to:
0-16 Linemen 6338 Frenzy S?
0-2 Khorngor 6338 Frenzy, Horns, Juggernaut GS
0-4 Bloodletters 7437 Frenzy/(MB?), Wild Animal, No Hands GAS
0-1 Herald (Bloodthirster stats)
Too much?
Cheers
Martin