Does anyone think that if we go to ground-control backup pilots, they'll be monitoring second-by-second as if they're actually flying, and able to save a situat

Does anyone think that if we go to ground-control backup pilots, they'll be monitoring second-by-second as if they're actually flying, and able to save a situation like US 1549? Or even other less dramatic urgent situations? At that point, why not keep them in the plane? If you go to ground control monitoring -- the only point of it being that pilots could monitor multiple flights -- you are saying that the pilots are there to fix longer term issues (like flight planning, diversions), etc. Things that don't happen on a few second's timescale. That might be acceptable on freight/cargo where losing a plane now and then is a risk you can deal with. Not with passengers. I don't think anyone is willing to go that far.