When John Schneider and Tom Wopat walked off of the Dukes of Hazzard, two other actors had to be hired to replace them.
They hired Byron Cherry(Coy Duke) and Christopher Mayer(Vance Duke). They starred in 19 episodes. When they starred in the show, the ratings plummeted. Many people disliked Coy and Vance and I was one of them.
Enos was brought back when Coy and Vance began starring in the Dukes of Hazzard. It's possible that they brought him back because they thought that it would help the ratings. If that was the reason for bringing Enos back, their plan failed miserably.
John Schneider and Tom Wopat temporarily quit because of a dispute over their salaries and merchandising royalties. Catherine Bach(Daisy Duke) asked Schneider and Wopat if they wanted her to quit also. They said no. It's a good thing that she didn't quit. The producers told her that if she quit, they would cancel the Dukes of Hazzard.
When John Schneider and Tom Wopat returned, the show's ratings went way up again. The Dukes of Hazzard continued until it was cancelled in 1985.
I don't know what became of Byron Cherry and Christopher Mayer. I've seen each of them only once after leaving the Dukes of Hazzard. I saw Cherry in an episode of In the heat of the night and I saw Mayer in a Shasta Cola commercial. I give Cherry and Mayer a 2 star rating.