It takes coaches like Roy, Pitino and others 4-5 years to build these teams... it takes Cal a few months to build a contender.
Having some experience I think makes the season easier, you have vets who can show the new studs the do's and don't during practice. Plus they have been there done that on a higher level than the freshmen who are learning the college game. Personally I think it will be hard to win a championship with nothing but freshmen.