I don't know how you could come to such a completely backward conclusion. In fact, ENT drew far more heavily on TOS concepts than any of the 24th-century series did. There was a ton of stuff in ENT that came exclusively or almost exclusively from TOS: Axanar, Malurians, Andorians, Coridanites, Tholians, Tellarites, green Orions, Rigelians, the Horizon (complete with a book about Chicago mobs on Travis's shelf), Ceti Alpha V, the Augments, T'Pau, Organians, Babel, smooth-headed Klingons, the Terran Empire, Colonel Green, etc. Not to mention a more in-depth exploration of the Vulcans than any series since TOS (or including TOS, really) had undertaken. They even did "North Star" as a tribute to TOS's parallel-Earth episodes. ENT actively embraced the kitschiest parts of TOS that the 24th-century series had generally avoided.