Really? My understanding of the matter is that every time the Bishops order them (the visionaries) not to continue the activities there, they are answered with defiance and disobedience. That alone tells me a whole lot. When St. Teresa of Avila began experiencing the prayer of infused contemplation in her methods of prayer, her spiritual director forbade her to engage in those types of prayers any more- Till a whole year had passed. She obeyed- perfectly. St. Padre Pio was ordered not to expose his stigmata until everything had been verified by Church authorities. He endured gruelling probings which bordered on persecution for the longest time- Again, perfect obedience.
Perhaps this internet article I found on mystical phenomena and obedience explains it best
mysticsofthechurch.com/2009/11/obedience-to-catholic-church-judging.html
Excerpt:
"Obedience to the Catholic Church has always been the “litmus test” that that Church uses for discerning the authenticity of a mystic or visionary and their alleged private revelations. A true mystic or visionary will always obey the legitimate religious superiors and authorities in the Church. We can be sure that if a mystic or seer is in any way disobedient to the local Bishop or their religious Superiors, then the alleged revelations and messages cannot be authentic. God’s graces flow through His Church in union with the legitimate authority (ie- Pope, Bishops, Religious Superiors) that He Himself has established."