The Zero Requiem marks a non-returning point: Lelouch and Suzaku have sacrified too much to step back. Even Lelouch at the end of the series, using his Geass on Nunnaly communicates us that he has grown up: to accomplish the plan also his sister's position can be forced.
I can't say that these are they salvific paths because all of the victims they were the cause of, but the right burden to stand for the choice they made.