So, to summarize we do not know what is the real cause of this fitting cracking, right?
Since probably it was that hardest of all the hard landings seen for A320 one can assume that Airbus stress would be very cautious as to let the a/c go, even on a ferry flight!
Whoever is the (usual) repair facility for the operator it is still better to do it on the site, with Airbus fleet support guys on the spot.
These crack are ugly and I sincerely hope that A320 won't be as unlucky as CRJ 700 with its MLG trunion crack issues.
Cheers