An industry is growing up around attacking Ted Cruz. Cruz went to Washington DC telling everyone who would listen where he stands and what he hopes to accomplish. I don't recall him saying he was going to DC to fit in with the status quo and watch while establlished Senators continue to ruin the country. I don't recall Cruz saying he wanted to learn at the feet of John McCain and Lindsey Graham.
The Senate wasn't created to become a Good Ol' Boy's Club for professional, white politicians. Cruz made it clear that he wants to limit power in government not help maintain and expand power. Cruz made it clear he wants to free the economy not find more ways to control the economy. All the concern trolls like Dickerson at Slate obviously didn't understand Cruz when he said he wants to change Washington not praise it.
The funniest part of Dickerson's article was when he described Obama's short Senate career as marked by bipartisan cooperation. Well maybe another part was funnier, when he said unnamed conservatives had concerns about Cruz, then when he used Tom Coburn as an example, the quote he used from Coburn actually pertained to Obama. Wow, this article was some pitiful hit piece.