Before I go any further I would like to say Welcome aboard to both Betablue and Mason.

Now on topic...
By Mason
Maybe he did the stuff he needed to do off panel, it was essentily said several times he was in training to be a Priest, he walked around with a collar on most of the time. Basicaly what i'm saying is we knew he was in training do we really need to see panels being filled up with him training taking time away from the actuil main storys.
I think the point is he would have had to say good-bye (just as Bobby would have had to in my example). The point is being a priest is a full time thing, just as Betablue, and many others, pointed out.
It would seems that the writers, editors and the other higher powers in Marvel didn't care to research the Catholic Church, and that Nightcrawler was stripped of all of his original personality and left to spout the occasional, canned ecclesiastical statment. There was no preamble, no reason and obviously, no research, into his Ordination as a Priest.
Kurt, prior to the whole eclesiastic thing, was an adventursome spirit ready to do the right thing for the right reasons, and do it with style!

: Once he joined the priesthood he was rather dull in a lot of ways.
While change is generally good, what purpose does making someone a cardboard cut out of a priest serve. Being a priest is a full time job how could Kurt stay a priest and still be a member of the X-men? And can you really see him taking confessions?
"Forgive me father for I beat up several people today."
"Ach, No worries I do that all the time..."
"Huh? You do?"
"Ja, but they deserved it; they were muggers (or drug dealers or slavers) who were asaulting this nice old lady... My only shame is one got away."
"Uhhh," The guy starts to sweat...
"As a matter of fact if I EVER catch that last one I would... Hey where are you going?" Kurt stops in surprise recognizing the retreating backside of the man. "It is YOU!"
BAMF! Pow, kick, gouge! "How dare..." Throw, crash! "...you assault..." Bamf! punch, kick, slam! "...that helpless..." Twist, pow, crunch! "...old lady!?" Kick!
Kurt stops and straitens his cassock...
I am not Catholic, nor even religious, but have seen many who are write that they feel insulted and angry over how this has been dealt with.