I will admit that a rooster had cut my day time predation. They have no effect on night time predation. BUT they are not effective protectors until the roosters are over a year old. Until then, they are only interested in one thing. The juvenile roosters are not protectors of the flock.
Now...
Well if there is a waitlist, some other people want those birds. Sell them this year, get some of their offspring next year.
Very often, IMO and experience, roosters raised with flock mates can become very aggressive. The rooster chicks grow faster and become sexually mature much sooner than...
ASAP is when I would separate that many roosters, especially if they are only with flock mates.
Personally, I think roosters take some experience, so I would let all of the roosters go, planning on adding a rooster next year. Do you only have pullets? Because if so, I would be quite surprised...