Karns and Smyly didn't have the hardware that Kluber has.
They gave up nothing in an off season when high end pitchers are getting $30+ million for a multiple Cy Young award winner.
All of the other pitchers are pretty much in line with what a league average starter with the potential for an excellent season is making. They have a track record as pitchers, so a reasonable degree of expectation is there. Now, the gamble will be whether or not they have enough talent to get a shot at the WC... that's debatable.
Eventually teams get tired of losing. Also, they are opening a new ballpark.