Well first up, why call them women priests, and not just simply priestesses?
If they are feeling they are called to be priestesses by the Holy Spirit, that is up to the Church to decide, its the way it goes for men also, a man might feel called, the Church decides whether or not it is a genuine call. Also keep these verses in mind when someone claims that the Holy Spirit is leading them do something that goes against Church teaching.
(2 Co 11:12–15) And what I do I will continue to do, in order to undermine the claim of those who would like to claim that in their boasted mission they work on the same terms as we do. For such men are false apostles, deceitful workmen, disguising themselves as apostles of Christ. And no wonder, for even Satan disguises himself as an angel of light. So it is not strange if his servants also disguise themselves as servants of righteousness.
Also St. Teresa of Avila has a small story about how the devil tricks us:
The devil, for instance, suggests to a sister, certain impetuous desires of doing penance, so that she never seems to rest but when she is torturing herself. This beginning is good; but if the superioress should have commanded that no penance should be done without leave, and the devil should make her believe that for so good an object she may take some liberty, she immediately and secretly enters upon such a course, whereby she in the end loses her health, and is therefore unable to do what the rule commands: then you see what all this apparent good ends in!
Teresa of Ávila, S., & Dalton, J. (1852). The Interior Castle (15–16). London: T. Jones.
So I would say to those women who want to be priestess to think is it worth disobeying the Church because you think God is calling you? Remember also the Church is a divine establishment, anything the Church teaches has come from God, and so to change the teaching on the priesthood would destroy the claim to truth the Church has, how can that be good?