I think we here know the only important thing in first week CFP rankings.  And it's not all that important.
But imagine they came out with rankings that had a 0 loss P5 team ranked 10th and a 2 loss team ranked 2nd.  Would that be any "better"?  
If a team has not played any 'ranked teams' yet, should they be penalized for beating mediocre teams decisively?