No big humbucker splitting fan, too, unless it's in a HSS set up or HH set up with a 5 way selector. Never liked it much in a LP type guitar.
That PRS DGT diagram looks interesting. It seems as if the resistors are in series with the coil tap line so that the non-active coil is not fully grounded. This may have an influence on hum susceptibility, too.
Bill Lawrence used a different approach by adding a capacitor of 0.022uf in series with the coil tap line. Instead of deactivating one coil his method reduces its resonant peak to a very low level. The purpose is to keep both coils active at low frequencies - thus eliminating single coil hum. I use a 0.047uf cap with my Miracle Man in "split mode".
Cheers Stephan
EDITED for typos