Yes, they didn't fvck up the finale, but I wasn't impressed either. No surprise factor. The season was finished with Hank's death. No intensity after that.
The gun machine in the car was a far fetched idea. And then just agreeing to bring Jesse to show him that "he's not his partner" was rather childish thing to do and no need for it, instead should have just shot Walter right away. I guess that's what happens in finale's, characters get dumb for the purpose of the ending.
Oh, and wtf happened to walt's house? They didn't explain that.