Father Feeney's fake excommunication occurred when newChurch was well under way, under Pope Pius XII.
The Feeney assault providentially started in the mid 1940s, when newChurch was still forming.
It became one of their unexpected, first public "street fights".
In the early 1950's Pius XII had allowed Bugini to initiate international liturgical conferences and modify the Mass Canon.
He had given Rosie Goldie, a wealthy Australian jewess a complex of buildings called the Piazza di San Calisto to organize literature for the new international hierarchy-laity relations. And if you recall, in 1953 and they extracted the "perfidious jew" from the Roman Missal.
At the time, newChurch stated Father Feeney was excommunicated for the "disobedience", but he was never presented with formal charges or given the ability to defend himself, as required by Canon Law. He stated this explicitly.
BTW, What evidence do you have showing Father Feeney was contrite and sorrowful for his actions?