I think, for those of us that have watched it for years, and seen a lot of future stars come through there, ALL the new ones are pitiful compared to what they used to be. It used to be a "Must See" and now, it I catch it it's just accidental, and it doesn't even get a smile out of me.
Must be bad writers, for one thing, but the show has been around for so long, they won't let it go. Give me the classic reruns any time. They still make me laugh.