No, Fr. Feeney was actually excommunicated for disobedience. He was summoned to Rome to meet with Pope Pius XII, and he continually refused, so he was excommunicated for disobedience, not the things he taught.
That's not a particularly strong argument for Feeneyism.
If the things he taught led to his outright refusal to obey the Vicar of Christ, what does that say about the things he taught?
SD