About AP disconnection, ie aborting the autolanding. This is required only if the red AUTOLAND light comes on. This does not happen regardless of the strength of the crosswind. Drift angle is not ever monitored, only beam drift or loss of signal. And below 100 ft, even a single autopilot failure will not change the landing status and an autolanding would be executed without any capability downgrade being indicated.
At 350 ft we ARE required to check the drift angle (refer Task Sharing, "check ILS Course"). This is not the ILS Final Approach Track which is fixed, but the actual aircraft course to keep you tracking the ILS beam. This may not correspond EXACTLY to drift angle, because the aircraft might possibly be correcting for a (small) beam deviation caused by changing winds. Also, this drift is only indicative of the crosswind at landing, because the winds would change as we go down.
Thanks a lot, Clonecity and PENKO.