The problem with playing platoon games is if you bat your righty 8th or 9th, he may get only one crack at the LHP before the opposing manager brings in the RHP long man from the bullpen in the fourth inning, to face precisely the batter you have in there to deter lefties.
Is Bader good enough to lead off when a southpaw is starting? Questionable, even if he gives way to Larnach or Wallner by mid-game. He's better against lefties, but not actually "good."