Several months ago I heard that there was some difference between Fr Phillips and the Archbishop over whether Our Lady of the Atonement would leave the Archdiocese to join the OCSP. If Fr Phillips were still an Anglican, I assume this letter would be equivalent to a notice of inhibition. This is probably not good news for Fr Phillips, nor indeed for the OCSP or Bp Lopes.
My inclination is to support the authority of diocesan bishops.