I am so ashamed. I thought that the reason Roger Rees left "The Visit" was that the show wasn't doing well at the box office; and he knew it was destined to close. I never read that it was due to an unexpected illness.
What I admired most about Roger Rees was that he was open about his sexual orientation. While I saw him on stage in "A Man of No Importance," "Indiscretions," and "End of the Day," I don't remember his performances from those three productions as being exceptional; but I do remember his work on "Cheers" as Robin Colcord, in which he was totally convincing as a cad.
I am impressed by the affectionate comments made by members of the Broadway community as to what Roger Rees meant to them. What a wonderful legacy he leaves behind.