Yes. Sue Ellen never had better chemistry with anyone else. I think that Clayton wouldn't have been brought onto the scene has they not need a substitute/replacement for Jock. While they ultimately filled different roles, it can't be overlooked that Howard Keel was added to the show as Jim Davis' decline became more visible onscreen. Some of the continuity errors are hilarious in hindsight; by the end of the series, Bobby had been born in no less than three different years!