Yeah, I totally disagree with the defense of Ox. In a movie filled with goofiness it's just uneeded AND takes away a lot of puzzle solving from Indy since Ox's has been there already. Also, that makes it 5!! people in this happy group adventure which lessens the sense of danger (if 5 people, most of them middle aged) make it through a trap or waterfall unscathed, then it must not be too dangerous. I didn't feel for Ox, since I didn't know how he was before he went insane and it sure wasn't funny. I've begun working on an edit and I'm doing everything I can to cut the Ox sillyness.
Just my opinion. But I do agree about the alien stuff. Not sure how I'm gonna fix that though.