There’s been a lot of criticism of the BSG finale since it aired, some of which I agree with and some of which I don’t. But I thought this article was interesting in that it examines possible Lost endings through the eyes of the BSG ending to see if some of the same criticisms might apply. It’s worth a read IMHO:
http://io9.com/5317172/could-losts-final-season-pull-a-battlestar-galactica