I thought it was decent. Not nearly as good as the past ones, but it did make me laugh. I liked the second skit with the "World Series of Manslaughter". My DVR did cut off the final little bit of the show, so I didn't get to see where the adult illiteracy thing was going.
The opening segment with Kang and Kotos was great. I'm a baseball fan, and I thought the "it's still too boring" and "Administrative Professionals Day" (which I believe is in April) cracks were quite funny. But hey, Kang and Kotos always deliver.
The rest of the episode had its moments, but Treehouse of Horror hasn't been the same in recent years anyways.