I liked the last scene and loved everything up until the commercial break when they found Earth. I especially loved the "truce" switcheroo and Cavil taking himself out. Unfortunately, I hated the rest, and here's why.
The worst problem was the absolute lack of logic. Adama saying goodbye to Lee was mind boggling. Why would Lee think he wasn't coming back? Why wouldn't Adama come back? Why would he say "I'm not long for this world" when that's obviously not remotely true? I was afraid he was gonna go fly into the sun! It could have been a simple scene: "Lee, I'm gonna go chill with your step mom until she dies, I'll see you in a bit". The shot of Adama on the cliff next to Laura's grave was wonderful, however. Actually, all of the photography on Earth was excellent, but my problems are plot related, not the production, so let me get back on track.
Even less logically sound than Adama wigging out is the idea that 38k human survivors are supposed to just agree to abandon technology and go caveman. I thought Lee was high when he said that. Yeah, I can definitely see wanting to get out of the tin cans. I can see a tortured soul like Tyroll wanting to go live in the mountains for awhile. But the majority of civilization would not want to become the Amish. They would land the ships and have them ready in case they were needed in an emergency, or they would turn them into building materials. They might not build huge cities but they would build quasi-modern living conditions - things like, you know, plumbing! Water treatment facilities! Hospitals, communication, government! 37.5k people at least would laugh at the plan. The few that might like it would change their minds after a few weeks of crapping outdoors. This was the worst thing about the ending for me, by far.
Kara winding up as an angel is a copout but it's acceptable, I guess. I don't like the inconsistency, though. Head Six and Head Baltar are guides who provide information that couldn't be gleamed any other way. That's fine. Kara, however, directly affects real people and objects. She does not exist in anyone's head. Then again, they had that Six early on - Season 1 I think? - who just vanished. My memory might be a little rusty there. I am not too mad about Kara, just rolling my eyes a bit at RDM taking the lazy way out of her complex story. Having her vanish mid conversation, Batman style, was annoying, but minor. The whole thing just reeked of writers painting themselves into a corner.
I wasn't a fan of the opera house resolution. It was alright, but it could have been a million times better. For a long time it was the central mystery of the show, then dropped, then brought back. OK, so Roslin is guided by the visions to protect Hera from Cavil, and Baltar and Caprica are guided to bring her to the CIC. I get it. They didn't steal her in the visions, they rescued her. But why all the visions? Why are the angels' plans so complicated? For a, logistically, incredibly minor event, why do these angels feel the need to protect and guide Baltar and Caprica all the way to that point? All they were guided to do was grab the girl and walk her to the CIC.
I'm glad that my predicted idea didn't come true - that most of the cast would die and Baltar would lead the remaining humans to earth - but this is still pretty lame. Both the Kara and angels/visions situations resulted in the lazy way out of a complicated problem. It's the natural result of the writers making things up as they go along, including deep mysteries with no planned solution. Don't give me that crap that they had it planned all along either - there's plenty of evidence from interviews and podcasts, not to mention the overall sloppy and inconsistent structure over the yeras, that there was no planning at all going into these mysteries.
I'm surprised that a show this dark went with a happy ending. I am not mad about this. It plays against expectations, which is good. Unfortunately the execution was incredibly sloppy. I'm glad they didn't give us a cop out ending with Laura. It was emotional, satisfying and logical. I'm a little mad that they completely gave up on the "dying leader" and "harbinger of death" threads. Of all the mystical things in this show, those were the most intriguing to me. I guess Pythia and the hybrids were wrong.
I give everything up to and including the first shot of Earth a 9.5/10, and everything after a 3. The extra points are for the final ending in the future, and the excellent photography, mainly Adama's last shot. That shot was good enough that I can, almost, pretend to forget the conversation with Lee before it.