Yes, you can switch saves between consoles. All Beth games have that capability. And yes, I've used it to fix bugged quests and such.
Are the file formats the same, so that a saved game from PC would work on an xbox?? If so, and if you can actually move them back and forth,
then my suggestion ought to do the trick, assuming that 1) it stays in effect, and 2) it doesn't bother you to have a permanently degraded skill.
I know that the setav command is NOT permanent, as it goes away as soon as a save is reloaded (a carryweight boost goes poof if you reload
to keep your idiot follower from dying for instance, even though the boost was from prior to entering the dungeon). I'll have to check to see what
modav and forceav do.