Something about sinning against the holy spirit and yet the WTS would never tell us what that was supposed to mean
. I think it is sinning against the Holy Spirit by removing reference to the Holy Spirit from the baptism, against Christ's clear command.
(Matthew 28:18-19) . . .. 19
Go therefore and make disciples of people of all the nations, baptizing them in the name of the Father and of the Son and of the holy spirit,
The Holy Spirit was replaced by the 'spirit-directed organisation' in 1985.