Took a look at this again after a week and made some edits:
I changed the composition of the trooper helmets to make them more pleasing. There were some empty spots on the right side I didn't like.
Battle damage for the trooper helmets.
Red smoke and highlights for the interior of the Sith temple / cave thing to better delineate OUTSIDE from INSIDE.
New specular highlights from the exterior on the rim lighting for the trooper heads.
I chose to add rough stitching and tears to our Ewok Sith's robes and gloves. It made for a more believable Ewok Sith--everything being homespun and hand-stitched.