Oh I'm not letting BSG off the hook I wasn't crazy about its final season either--Caprica six wasted after she became a prisoner only to end up with Tighe?!? and have a baby only to lose it which lacked any emotional resonance, the pointlessness of the Baltar cult subplot, the way the final stretch of episodes were just drawn out with no plot advance only spinning the wheels to time it to come together in the finale, the melodrama really went into overdrive i.e. Adama banging around in his room, the waste of the Final Five after "No Exit", the stupid twist of Tyrol not being the father of Cally's baby, too much pretentiousness etc but I'm harder on LOST because it put all its chips in on mythology and dropped the ball big time. I think if you look at what LOST failed to do with its mythology compared to the unanswered questions for BSG I think you'll see it is monumental.But in truth, it's very easy to level similar criticisms toward BSG -- in terms of both plot and character resolution (i.e. Adama never saying goodbye to Saul; Kara simply disappearing, leaving Lee stranded in a field without even his father around; everyone giving up all technology). And it, too, reveled in the "mysteries" of its mythos at the expense of its characters (before suddenly deciding to "frak the plot" and proclaim that "it's the characters stupid" for the finale).
At the end of the day BSG had nowhere near the investment in mythology or unanswered questions so I hadn't the investment. LOST, on the otherhand, was densely plotted with where the writers left you to piece together stuff and now I feel cheated I wasted all the time because they never supplied those essential pieces.
Like I said these heavily serialized interconnected mythology shows just seem too hard to pull off that's why I believe serialized dramas should approach it like ENT's Xindi arc minus the filler episodes it gave or Heroes season one.