Have to say I was a bit disappointed overall ... not because it was wriiten disjointedly, or because the finale wasn't what I wanted to happen, or because it was obviously thrown together as they went along, (because they still made it work, to a certain degree), but because what they started with could have progressed into something much, much more impactful and substantive.
The directions they went in after season two especially, just became progressively less believable and more incoherent, and it served to magnify the fact that this was a "think-it-up-as-we-go-along" kind of production. Highly intelligent and creative writers, though, and that's why it was still successful.
For the hard-core fans, take heart, I still enjoyed it very much as entertainment, but to me, what they began with bespoke and eluded to something much more epic and intense, and what I was sure would develop into one of the greatest shows of this generation, just plain got in it's own way, and came up far short of what it could have been.
In my humble opinion, what started out as an A+, ended up as a B-.