I agree with BUTCHER...to carry on the show would do a major disservice to it. Unlike just about every other good drama (Weeds, Entourage, etc. ), they knew when enough was enough.
And i agree, it was a "perfect" ending, but essentially, it was still open IMHO. What happened to Jesse? Did WW really die? We dont know. I dont want to know. I want to let it RIP like it should.