It's all pretty simple. The transplant team feels that it is rare to see the strictures disappear, however, they also feel it could just be a matter of time before they return. BUT, at this point, they are considering him healthy.
The plan is to have his blood drawn every two weeks to check for any signs of disease progression and then after two months if he is still normal, it will move to monthly. They were very clear to Geoff when they said "be sure to watch for any signs of liver trouble" (i.e. yellow eyes, fatigue, etc.). There was no mention of coming off the transplant list nor did they ever use the word 'cured', but everyone was encouraged.
The underlying tone of the visit was time will tell.