I theorize the Cursed seal "kills" the body keeping it from degrading like the one Oro had. However all of his "chosen" potential successors had the seal.

I honestly am wondering how this is all going to play out. Will Orochimaru have control of Sasuke when he is sleeping or is he really gone, lost in Sasuske consciousness...

One MAJOR failure is the fact sasuke was able to use his sharingan while in Oro's spiritual dimension. We all know it was not a physical place he was when his will consumed Oro's deimensiona ndh e made reference to all Oro's justu failing to his eyes( Which we know is not true as Oro beat sasuke, had it been a fight sauske would have died when his weak ass was paralyzed: he cant defeat Itachi without Orochimaru ) However how the hell does his spiritual self have use of a physical attribute... although the explanation of how the spiritual dimension was taken over by Sasuke will does follow some sort of continuity.

I just want Oro to hurry back Sasuke really lacks any depth except he is a pretty nice guy freeing prisoners and all.