The heirarchy will know what they're going to get from Hilfenhaus, they will not be confident of that from Bollinger. Doubt we will see any more quicks added to the squad for this game.
Personally, I wouldn't mind the spinner being added into the team at the MCG. If it's what it usually is at the 'G (a slow pooper) then that change of pace can be pretty handy. But the only change that I'd want is Hauritz, not Beer. If Beer stays in the squad, I don't really mind playing four quicks as much.