I'd say that bluish black is just it healing. It should be normal in a couple days. His apetite is probably caused because of stress due to his new surroundings, I would leave one cricket in the cage with him, if they're are too many crickets they will bite him. I do not know anything about the loss of pigmentation or worsening in look. I say, keep on giving him the honey baths. I may be wrong, hopefully someone more advanced at this subject will reply to your thread here. I hope I helped some.