For practical reasons we only need 2 classes.
Primitive, for selfbows and wood shafts, and modern for all other Recurves/Longbows, any arow type,no sights , shot off the shelf.
Todays longbows and recurves are so close in performance that the advantages of one type over the other is just not there any more.
Currently here we see RU class with as many longbows shooting it as recurves, and the longbow class that only allows wood arrows, recurves are not permitted.
We would be better served with having a Traditional class, selfbow/wood arrow and a modern class, that has all laminated longbows and recurves shooting wood or any other arrow type. Shoot what you like, just have fun .