The finale was a decent episode. But I think that ever since the destruction of the HUB, the show was rudderless.
I think that this is one of the problems when the central premise of a show is a "mystery." It always ends up that the big reveal is a huge disappointment.
Also, what happened to all of the basestars that Cavil had under control? Not to mention, the "millions" of cylons on the colonies. Wouldn't they lay out to search for the final five to rebuild resurrection?
I think the finale needed a 20-30 year jump forward to show aging skinjobs scanning earth, and not detecting technology, continue searching for the final five. It would have given closure to the show's overall theme. Instead we just get a "spiritual" explanation. The reason I feel this way is back when they found the temple of jupiter, Cavil advocated nuking the planet and spending an infinite amount of time searching for earth. Even without resurrection, I think that the remaining cylons would have the same sentiment.
The other thing that had not been really discussed, and will hopefully come out in the next few entries, is what happened to the artificial intelligence that was the original cylon race? Maybe "the plan" will give us more insight to cylon society.