Definitely keep taking pictures and posting them, please. Think of the next person who finds one of their birds in similar condition and starts looking around BYC to see if it has a chance to survive.
Having weekly pictures of "7 days later" "2 weeks later" and then the hopeful "all healed"...
If there's a mild part of the day --- if you take him outside, I would keep him out of physical contact with the others because chickens love feasting on flesh and blood. So if he goes out, make sure they can't reach him.
If you have access to the meloxicam, I would give it a go. Aspirin wise, I use the low dose adult chewable kind, 81mg, ground up into something I know will get eaten (for my flock, watermelon is the slam dunk, followed by scrambled eggs) and it goes right on down. Not sure if it eases up the...
He's made it through the first day and that's fantastic! If he's happier without the bandage, then yes, leave it off- just keep the wound moist using the antibiotic ointment.
Given his wounds, I would worry about trying to tube him- you pretty much need to be able to control his head and neck...
Also- pick up a big ole box of Qtips, and a box of regular gauze. Cleaning up his head/comb/face isn't a giant priority - but sometimes the stress can lead to serum that will kinda glue their eyes shut. Moistened gauze (toilet paper won't hold together, paper towels are too rough in texture)...
Give him warm sugar water- if you have poultridrench too- add that in.
Cut the feathers - ANYTHING that overlaps with the wound, cut as close as you can to the base of the feather. ALSO - put antibiotic ointment - neosporin, triple antibiotic- whatever you have - and slather it on the wound...