I like it, with three exceptions:
1) the priest and the noble to be appointed must be of the same realm.
2) the priest should be an elder for at least 30 days.
3) the priest should be a priest for at least 30 days.
I totally agree with 2 and 3, they make perfect sense.
#1 I disagree with. IMHO, I think it'd be awesome to see a priest from Morek flip an Asylonian region to an Astrumite lord.