This is EXACTLY what hunter used to have! You are either intentionally being obtuse/hypocritical or you don’t know what the hunter class was like before Legion.
You can’t have it both ways. If the base of the class is similar between all three specs then they are either the same or they aren’t. Yes, rogues all attack from stealth but then all Mages and Warlocks cast spells. You can’t sit there and say Warlocks and Mages have different flavors, even though Lock flavor is exactly what hunter was, and then say Rogues and Hunter (with RSV) flavor is/was to similar when there are differences between each specs playstyle.