Going back to the s/ch autoland...
I can only talk classics - On a dual channel autoland with the trim bias coming in, the control column goes from a forward position to quite an aft one (of course not helped by the pitch power couple when the A/T retards the thrust levers.) This is quite a lot of control authority that the system needs in order to achieve a satisfactory autoland.
Single channel, without the trim bias I don't see how a reliable autoland is achieved. I have heard there is a limited attempt at a flare which I would have used in dire straits, but I guess this is limited by the control authority of the autopilot...
How much of this is relevant to the NG I dunno!