Whilst I think this is superb TV and avoids more successfully than most the temptation to go too long once they know their onto a good thing. I cant help thinking the proper ending was series three when Gus was blown up.
Since that series theres been a few tenuous moments an example of which is the final episode in which Jack was about to kill Walt but stopped to prove he wasn't in partnership with Pink..really thats all a bit 007 and the villain explaining his master plan whilst giving our hero time to instigate plan B.
It was scenes like that which for me made BB a brilliant bit of escapism TV but put it at least at least one step behind The Wire in credible story telling.
Still already missing Walt and not convinced they haven't left it open for a return based on another one of those "things that make you mmm" moments in the final scene when the plod didn't check him for live.
I would also like to claim the Waltism for the reason I cycle " I did because I liked it, I was good at it..and it made me feel alive" at least two of those apply to me and riding a bike.