I think that one reason why Mr. Lacy may have not been used so much is that I think that he did not have a contract with the show - or, at least, he did not have a contract during all the time that he began playing Tony and the time of the show's cancellation.
During part of the time that Dark Shadows was running, Mr. Lacy played Simon Gilbey on As the World Turns. Also, I have read that he had a very brief role on The Secret Storm, and that may have been during the time that Dark Shadows was running. (I am sure about the As the World Turns role being during the time that he was on Dark Shadows, but I am not sure about the role on The Secret Storm.)
It was during the time that the Parallel Time was airing that Mr. Lacy was playing Simon Gilbey.
(By the way, Clarice Blackburn played Mary Lou Northcoate on The Secret Storm during her time on Dark Shadows. It was during Parallel Time, and, after her role had ended on The Secret Storm, she played Mrs. Johnson in the 1995 storyline. Also, John Karlen played a major role on Love Is a Many Splendored Thing during the time that Willie was supposed to be in the mental hospital.)
