I doubt the matter would be much different, as a Sacrament, that what used to be the norm for Protestant coverts - a conditional Sacrament. In their case, Baptism. In the former case, Holy Orders. Only on condition, only known to God, but based on some investigation. As mentioned, there most certainly is some dispute, regardless of such investigation. Some question the 'reform' sacraments, pretty much across the board, save for Baptism. If they were not previously ordained in this way, then now they would be.
The validity issues are all a big question mark for me. I don't know. I hear both sides of the argument and both make valid points.
I forgot to add in regards to Baptism, most (or all?) of the exorcisms prayers were removed in the new ritual.