If Iowa State, Minnesota, Cal, Stanford, Michigan State, etc. teach us anything, it's that it's pretty difficult to gauge who will be a good P5 and who will be bad several years down the road.
Make up a schedule like that, and you run a high risk of inadvertently assembling a murder's row. The upside is limited, too; the teams might end up being so bad that you don't get much credit for scheduling the P5s anyway.