Im not sure you can use passenger comfort as an argument to use autoland. Ive had more possitive autolands (ie. what a pax would consider bad) than smooth ones (what a pax would consider good). I think if you encourage more pilots to leave autoland in they will become more and more rusty with manual flying and therefore when they had to (visual, non-precision, circling approaches) you would actually have a negative effect on passenger comfort.
In terms of precision, I think the autoland has as much chance of missing floating past the touchdown point as any other pilot. It is also quite normal for the autoland to touch down to one side of the centreline...particuarly with a small crosswind.
The autoland system also INCREASES the landing distance of the aircraft. Also if you are doing an autoland onto a non-protected runway (no runways are generally protected unless lovis procedures are in force) you have higher minima.