SDS should let us pay stubs to reenter with the progress where we failed rather than repeating the entire grind. When we lose a Conquest game, we don't have to restart the entire map - just replay that game.
This single handedly would make this mode awesome! The hardcore nature of this mode makes it so tense and unenjoyable for me. I would gladly re-enter as many times as I needed to and you wouldn't have to give me the rewards again as like the OP said, you would start off from the last moment that you passed. Seems like a win for everyone.