I agree entirely with that review by Morgenstern. I don't see how people can say that Blanchett was one of the best villains. Yes, she gets to fight, but her psychic abilities are barely used. It's as if they couldn't decide which direction to go with her. Either make her the sultry vixen (as her theme suggests) or make her a total badass. Or, an even better idea, put the two ideas together and make an interesting character. But instead they decided to start off sultry, show some badass, and make the rest bland.
I was so excited that Marion was returning. But she was not the same character I fell in love with. She was dull, and there simply because she was Marion. Better than the alternative, having some young actress follow Indy around and falling head over heels in love with him, but lets see some development between Marion and Indy. Let's see them fall in love all over again. Actually, lets see Marion do anything other than drive a car around a jungle.
Mutt's character is one that I'm on the fence about. I think that Shia played off Ford well, but the character was lacking something. I do enjoy him, and I can't say that I found him to be the slightest bit annoying (although, the rope swinging thing is absolutely ridiculous. The monkeys only made it worse).
The skull was just not interesting. I know Lucas loved the idea, but it just did not work for me at all. Even if it had been a Mayan skull with magical powers I might have bought it, but the aliens just did not work.
The film does have some good moments. The end was decent, and a nice little joke. I liked the location being in the jungle, as opposed to once again being in the desert. I didn't mind the Area 51 opening, although I feel that the nuclear testing/Doom Town was completely unnecessary. It added nothing. The ants were good, and I love the snake/quicksand thing.