I agree that the Alabama Shakes album is pretty crappy, but how can you really be disapointed by a debut album by a bunch of nobodies? I mean what was the expectation level on it?
I think the Band of Horses album was the most disappointing for me. After their great first two albums, they've released a tepid third album and the fourth was a borderline stinker. Sure, there were many crappy albums in 2012, but I totally expected that (Jack White I'm looking at you, tough guy). I guess I still had some hope for BOH, but now I've completely lost interest.
The Justin Townes Earle album was somewhat of a disappointment too. He moved further away from his distinctive honky tonk sound to a boring, more generic alt-country sound that made him sound more like Steve Earle's son. Still puts on a great live show though.