Interesting story, but the FMS already can calculate the required distances in various scenarios. I'm not aware of an FMS that can do the what-if type analysis

Interesting story, but the FMS already can calculate the required distances in various scenarios. I'm not aware of an FMS that can do the what-if type analysis automatically about the range of acceptable wind directions and speeds, but that can certainly be built. Instead of the F/O flying the approach, he could simply have let the autopilot do the whole thing and focus himself, as he did, on the strategic aspects of the flight.