I think because how good Walsh is as a Fullback it's a bit crazy to transition him to the halves atleast while he has the speed he has and he is very young and will still be very young when Reyno retires, I do see alot of Locky in him as in he has alot of creative ability that will work in the halves, I think his short kicking game is very good at his age even if he was playing 7, but the bigger kicks are still very raw, but his ability to manage a game are miles away from being capable as a 7 right now, he does have that extroverted personality that will work as a 7, but from what I see that is late career at best move at this stage because he will need to develop leadership and game management intelligence to make it all work together as a skillset.
He is definitely a more Halves capable fullback then the vast majority of examples we have seen since Locky started the trend for others to try do similar though, even though let's remember Lockyer was a Half converted to fullback, Reece originally isn't that but has alot of the skills you need as a Half.
Post Reyno from what I see we are going to have to look for another established 7 at this point, if we try develop a young half we are going to struggle, this is why I think we need to milk every ounce of years left in him while we can, remember we have a young as **** 6 at the moment as well that will take a few years to hit his stride in the position too.