I interpret your ? to be-- Should recurvers, and longbow men be in separate divisions?
In over 40yrs. of shooting, in all kinds of cirumstances,(including at least 100 3D's) I have not witnessed any decernible diff. Some clubs do make a distinction, and make 2 divisions, as if longbow shooters are not as capable. Yeah, tell that to H.Hill, B.Ferguson. Its about the shooter, not the particular curve of the bow. Ive shot both, and watched others for so many years, that I can't imagine how someone thinks their is any quantifiable diff. Its a silly myth.