I saw the first two episodes too and the chemistry just isn't there. That's what made Mythbusters worth watching, Adam and Jamie's chemistry. This just feels wrong, plus they are trying to do the same things Adam and Jamie did instead of making the show their own. They needed a new Buster. Why? Do something new.
Your correct, they don't have any chemistry at all. Adam and Jamie had a history together long before Mythbusters started and you could see that from the beginning. Throwing a couple of people together who never met before last year and expecting them to be the new Adam and Jamie is not going to work.