It seems even straightforward visa changes can take an inordinate amount of time. We were strongly linked with the ex Wakey lad Bronco's signed but was over their quota so couldn't play him. After they reached a deal there was interest from us in taking him for the rest of the season (sorry cant just recall his name).
Anyway after going public that we were looking to sign him and had agreed terms (he was supposedly staying with Phelps as they were best mates or something), it was then announced he was going back to Oz because of the time it would take for his visa to come through.
Now it could of course have been a smoke screen and he just wanted to get back to Oz with his severance deal, if there were no guarantees after this season.
So it makes sense for Hull to be cautious until everything is sorted.