If this will be successful, it's going ot be a more improve Vic Manuel.
I believe they are trying to make him like Justin Chua, a big man who can shoot 3s but haven't really seen Manuel making a lot of 3 points shots in his old team.
Well, this will be a big improvement for him if he will try to pull this one out in the league. We already know that despite of his height disadvantage over other bigs in the league, he is a great player inside the paint that is why he is "Muscle Man".
As per my opinion, the roster of Phoenix has already bigs that can shoot threes such as Perkins, Chua and Manuel if he will be. Like @vaculin said, he can just stay at the paint and just generate points out there and shooting threes for him isn't necessary since we saw him dominating the paint many times already all throughout his career but can't blame if the team wants him to shoot threes then so be it. Lets just see if this will be a success or a fail.