BOAC, ILS TCH 50ft. Some PAPIs MEHT 71ft. That's a fair bit of bitumen. However, these "big jet" PAPIs are normally on long, long runways where LDA isn't an issue in a "small" jet like a 737.
Changing aimpoints at 200ft is silly idea, though, IMO. On the GS, take a snapshot at 200ft and hold it, if not ease forward a tad to counter the fright factor.
43inches of T-VASIS: way to go! Unfortunately, the beancounters think otherwise.