In the case of Colorado they could keep the primitive muzzy season during the elk rut in Sept. Then have a modern muzzy season later in Oct with the rifle hunt seasons. Not at the same time, in it's own season. There's room for it.
Then the primitive season would be flintlock, real black powder, primitive sights, and a PRB. That would deserve to be in the rut season with the bow hunters. Not the way it is now.
I'd love to be on the hunt with other flintlock hunters. I'd know they were true muzzleloaders and not someone just looking for another season to hunt.