Latecomer to the thread, here, but I noticed the reference to the "hiatus" as one of the contributing factors to the show's downfall. I just gotta say, seriously, when will they learn?
Think about it - this long hiatus nonsense really started (at least, if recent memory serves) with the Sopranos. I remember the flak HBO was getting from the fans who complained that if we were forced to wait so long (I think there was once a 1+ year wait between two seasons late in the series) then the writing and production quality had better blow our socks off. It wasn't. It was about the same as it was before, which wasn't bad, but it certainly wasn't worth the long wait, either. It started stinking of pretentious arrogance on the part of the producers, assuming, hey! It's the Sopranos! We could feed them shit and they would still come back to the table for seconds and thirds. Many of us had felt that Paramount had taken this same tactic with later incarnations of Star Trek, both on TV and in film. I know MANY have voiced that concern over Lucas and his odd creative "choices" in the new trilogy.
Now EVERYBODY is doing it! Shorter seasons, separate "Season X" and "Season X.5" box sets (and of course the now-common Season X plus X.5 double-dip box set), longer waits between seasons, delayed air-dates despite the fact that the final cuts have been in the can months prior. Battlestar, Caprica, SG-U, Sons of Anarchy, Justified and a whole butt-load of other examples that I'm sure others could name that I'm not aware of. Many of these shows are now gone. They complain about bad ratings and they have only themselves to blame for their scheduling ineptitude. In the meantime, good shows with potential suffer and the fans get bent over, again and again.
Don't get me wrong, I don't mind shorter seasons necessarily, but I recall that the UK does have shorter seasons, but they have at least two seasons per year! That's the way to do it! And give some of the shows a little more of a chance than 10 measly episodes and less than a half-a-season (The Cape). Yes, other shows have run their course (Lost, Heroes, soon-to-be-House), but some just never seem to be given a real go of it to find their stride.
So leave the shows alone and stabilize the damn schedules already!
My 2 cubits' worth anyway.