The whole Alyssa thing was just...odd. She seemed to have an irritable almost "I've got this locked" mood about her throughout what I saw. IIRC, she was asked a question in her interview (it may have been Brenda, yikes) and Alyssa said something like, "Well, I don't think very well on my feet." and Brenda (or whoever it was) said, "You're representing the Cowboys and need to be able to react quickly." Alyssa didn't recover well from that but if it was Brenda who asked, she can be pretty fierce, as Kat well knows from her experience. Then Alyssa looked flabby on the Jumbo Tron. She had to have known that those two things are what got her cut but she seemed surprised.
Whitney's L'il Wayne mistake was not intentional (IMHO) but it was oh so wrong and yes, she should have been cut. That's such a lack of good judgment that I wouldn't have kept her around for fear of what else she might do in terms of being an ambassador risk, regardless of how good of a dancer she was. But the climate in which she did it was laxer then and I'm guessing either Kelli or Judy went to bat for her to keep her around.