I didn't care for the last season, mostly because the theological element felt shoehorned in and I didn't like the end of Starbuck's arc but I don't think it was as bad as what people made it out to be.
Small quibbles about a remarkable show. The tension in s1 is what gives it high marks for me - top shelf storytelling.
A few days ago I posted about how 17 years later I still have genuine heartbreak with the last scene of the Sopranos. With BSG it happens more than once. The characters and their interactions are so well built... that's really what the series is about.
I'm a complete, staunch, irredeemable atheist and I don't know if that's where you're coming from in regards the "theological" angle.
I just took it as part of the storytelling, it's just another element that adds to it. Most people are not atheists, at the end of the day, and again, it's a show about people.
Oh nah, I was an atheist for years but theological elements in a story don't bother me at all. When incorporated well, it can add a lot of depth and nuance to a story. I just didn't like how they approached it, it didn't feel like an organic part of what had been built over the first few seasons. It felt like they didn't know how to wrap it up, and hit the audience with a deus ex machina for lack of time and money to flesh out those ideas more fully.
But to be fair, those are old impressions. It has been a lifetime since I watched the finale.
