As far as cancelling it goes....I don't think it will ever happen. NBC doesn't have many long time running shows left.
I watched this week's old SNL rerun @ 2 am, with Ron Reagan and The Nelson and an extremely young looking Penn and Teller. It was bad bad bad (except for Terry Sweeney's Nancy Regan) and extremely dated. Dennis Miller with all the Reagan jokes, Randy Quaid as Reagan...but Penn and Teller were decent. Anyway, if you compare then to now (and it WAS a Lorne show), it's not nearly as bad as it once was. I think what happens is that it gets good, people start loving it and then the successful actors and writers flee, leaving huge holes in the staff on screen and off. Then it takes awhile for the new guys to find thier feet and when they do, the cycle resumes. I can't speculate why the breaking up on stage is allowed or anything like that, since I do not work there. But that does piss me off.