I guess most people are disappointed by the Sopranos series finale, hoping, well different things. Some thought Chase was gutless for killing of Phil Leotardo; others thought that there should have been more closure.
Something was about to happen when the black screen hit us, and Chase clearly wanted our imagination to figure it out ourselves. What I expected was that the guy who went to the bathroom would come out with a big gun, spraying down anyone within a 10-foot radius of the Soprano family, and that the only question would be whether Meadow would avoid the massacre. I was expecting to be surprised and possibly shocked.
But you'll recall that the whole series has been about people - of decidedly mixed virtue - trying to cope with forces larger than themselves. Tony was a ruthless strategic thinker with great survival skills, and his biggest shortcoming was his temper. He characterized at least two people he dealt with as "degenerate gamblers," yet he acquired a gambling problem that seemed to be cured by offing Chris.
It would have been appropriate to finish it off with the Sopranos catching a break before the perfect storm of interfamily warfare, internal insurrection (Paulie), the Fed and Essex County DA finally getting their act together, and the Soprano family disintegrating, with Tony caught in the middle of it all. Then the loose end could have been whether Tony would have the capacity to overcome (and if necessary conceal) dissent within his own ranks and make peace with the Brooklyn mob, reorganize for strength in his own family, beat the rap, and find a new status quo with his own family. In other words, start a new series, with a more middle-aged Tony, a more sharply honed and less innocent Meadow, a thoroughly corrupted AJ, and Carmela more resigned to the way things truly are.