If the blackened part is completely dried up, you might remove it. I would tend to leave things alone. Can you see healthy tissue forming around the edges?
I'd back off on the peroxide if he were mine at this point. I'd be afraid that it would do more harm to granulating tissue than good. Looks as if his healing is right on track.
Not sure about the 'lip smacking' I'm guessing that as he eats or drinks the movement of his beak may be causing some pain or 'different' feeling causing him to click his beak. If you have some ophthalmic drops, it will not hurt to moisten his injured eye with them.
If he has no internal injuries, it is very likely that he will survive. In the pictures he does not look to be neurologically impaired. Keep slathering the wound with antibiotic ointment, and it will gradually heal from the 'outside in'. I have had several chickens and pigeons 'scalped' in...