He's young but he's also ambitious. If he was put on the market today, he'd attract atleast half a dozen clubs for his signature, unlike the chilean. So I don't see why he should be Bravo's sub when he can be a starting keeper at a top club elsewhere, and in doing so challenge Seuer for Die Mannschaft's #1, which seems to be his main objective.
Bravo is Lucho's man, who was bought for big money. He'll be given the platform and the opps, to justify his purchase. Seeing Lucho overlooked his Napoli howler, and his interviews belittling his younger comp, suggest he backs Bravo fully.
Playing tS in the CDR, and CL would be gross mismanagement of him, considering the gulf in quality btwn the two comps. You can't throw a 22y.o in the CL without warm-up games, and expect him to beast it. The logical thing is to have one designated keeper for both PL and CL, and the other for the CDR. OR, have more experience reserved for the CL (in this case Bravo) and allow the younger 'un to grow with the continuity and the assurance that the league offers, unlike the fine margin-for-error-CL.
In short, I think we'll lose a potentially world class keeper over Lucho's 31 y.o preference. I may get hate for this, but I hope one of Asenjo/D.Alves win the zamora, or else we'll 've some delusional folks tell us what a world class keeper Bravo is (like in the aftermath of the WC). I can't get myself to like someone who shows li'l regard/respect to his competitors.