Maleval has been given new upper legs via a CW Dooku (speeder bike version) that give him the added hip articulation and increased his height substantially. I also modified his brow with sculpt to make him a tad meaner looking. Lastly, he got a whip from Lumiya which isn't accurate but better than the string one he originally came with imo.
I modified Darth Krayt's shoulder pads so the sit better in my opinion and give his upper arms better movement. I also used a better waist piece to make him taller and the articulated ankles help the height as well.