I never played Dune II, I've only seen some footage in it in videos about C&C and RTS, I guess I just assumed that C&C shaved off the fat and worked on the general interface that all RTS used today. I don't know if I'd say Warcraft/Starcraft were more influential, I really can't think of anything they innovated or standardized, except maybe a map editor and the unique characters of Warcraft III, but even then the only thing I think they started with that was the level progression they could undergo.