To me it still seems to have color. Not the bleach white or the color of algea growing on its skeleto., I dont think it is tissueless. I think it could come back if the condition that caused the problem to begin with has been repaired.
It's hard to tell if there's any tissue left from the pics. If there isn't then it's more than likely a gonner. I've seen frogspawn and other LPS come back from tissue loss, but my experience with SPS has been pretty dismal once the tissue is gone.
can't be sure if it is really 'tissueless'...seems rather ok wif me...Reef Keeper, you are the only best person to judge for yourself. it looks pretty ok with me. like what someone mentioned...let it be covered wif algae b4 throwing your frag into the dustbin...