It radically diminishes the importance of New England and the northeast (hurting a more regional candidate). I think on the Republican side, it pushes for more libertarian candidates, due to the west being the second week. OTOH, with such a draw for California in the 2nd week, it might not matter too much (although, are there any Republicans there left?
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Regardless of party, CA could be the focus for early delegates, like how Florida is an important, big, early one. In fact, it might coalesce around establishment candidates getting wins in Illinois and California, which would hurt the overall process. I dunno though, there are many possibilities.