Astardes is pure teff gold mate. Yeah, the orkz will have weirdboys as an elite class, maybe post launch, but they will be there, sooner or later. Also the abilities of them will be affected by the amount of orkz, wich is wonderful.
Well if we base abilities from dawn of war 2: Warp vomit, Foot of Gork, Warp-head (hastens nearby units move speed), Ovah Dere (throws friendly units), Frazzle ( DoT that repeatedly jumps through adjacent enemy units) they could go with a few good choices.
This would be hilarious, picture entire mobs being thrown over walls or into cliffs, depending on how much of a squig fondler the weird boy player is..