Wow. That dude looks mean, like he should.
The mini itself is in a great position and all the proper bits look great. The only thing i would suggest would be and optional weapon, perhaps an axe since hes screaming bloodletter, and id like to see a shoulder pad on him. Most of the minis in your line have got shoulder pads, which makes sense because they are gladiators. It might look really cool to put a whole armored manica on his left arm since it wont have a weapon.
Other than those meager suggestions this mini is looking great.
First off, Bloodletters use swords Bro, they always have since the old Realms of Chaos days way back when! So if its a Bloodletter your looking for, a sword it should be, now a Bloodthirster! there is a beast with an axe, although this diminutive fellow hardly has the mass to fill those sizable hooves.
I like him, I have to say I am slightly disappointed it is slightly Khornate as everyone and their dog seems to love Khorne and everything Khroney. My first impressions were that it reminded me of a yolked up bloodletter, then it reminded me of a mini-version of one of the daemon princes I've seen around. All in all it is an impressive model to be sure and there isn't much I can add save some skulls or decapitated bits to throw on him, maybe a large rack of skulls mounted on his back? Or a severed head in his open claw? You could also try to texture his flesh to make him seem more sinewy, like raw muscle without skin for that terror factor!
Thats all I have right now,
-- Gordraz Blacktoof da Black