Liverpool are a black hole for youngsters nowadays, he'd be very poorly advised to go there.
It's the old debate do you stay at a smaller club with a chance of first team football fairly soon in your career or go to a big club with an academy coaching structure. From what I am told George Wood rates him as the best keeper he has seen at that age and we just accept we can't offer him the amount of goalkeeping coaching that Liverpool can. We have a part time goalkeeping coach and they will have specialist coaches at academy, reserve level.
This might be more of a case where we would be standing in the way of his development and Fitton is making sure we are compensated adequately. A keeper would benefit more from specialist coaching than say an outfield player and if you look at a couple of the keepers Liverpool have let go they have still gone on to play in the Premier League e.g. Chris Kirkland & Scott Carson. If he get's bombed out at 21 he might have benefitted from good habits coached into him and then make his way through the leagues again