As far as the season 2 finale, I thought it was fantastic. I was hoping that Sheri would catch a .308 in the brain pan, though. Also, I don't think that the president was infected with a bio-agent since that would infect everyone around him, including Naked Mandy. I'm thinking a blister agent, given how his hand looked.
I'm still real dubious of Kate, though especially with the vague conversation she had with her sister in the Hannibal Lecter suite.