I'm in favor of it ending. While it's always sad to see a loved show end, the closure is almost always better when a series goes out on its own terms. I'd rather see a LOST or Fringe end with its own story, than a million other series that never had that chance. Plus the inevitable decline over time that almost every show faces.
So while I'm not in favor of it ending NOW, I am glad he is bringing it to his own conclusion, in his own time, at his own pace. Same for Breaking Bad and a few others.
The only reason to move it to an HBO or SHO is so we can get the real version of "Zou Bisou Bisou".
"Happiness is not about doing, its about being." - R Branson