Hasn't it always made sabermetric sense to have a non dominant pitcher pitch twice a week for 2 and 4 innings +/- then once per 6 days? Relievers pitch best on 1 and 2 days rest. They pitch poorly on 1 and 3 or more. Starters pitch better in innings 1-4 then 5-7. This also gives you a second point each game to bring in a reliever when a "starter" is in trouble. So why hasn't a team made a staff out of a bunch of long and short relievers yet? If ever there was a year to try it...