You are over thinking this. Hoard and mucius are both wings. Neither of them will ever play in the post. We either get them as wings or we don't get them. If we play 4 out one 1 that opens another wings spot but we aren't going to stick either of them in the post.
My best guess is that wth the way Manning is currently recruiting that he is trying to make Wake look as much like the modern day positionless NBA as he can. We will never run out of ways to play 6'8" guys that can defend, dribble, pass, and score. The position they play is irrelevant at that size because you can morph into whatever is necessary.
We want a big with those three because of all three of those players see themselves as a guard and not a big. If you recruit another guard your chances of signing Hoard and mucius drop significantly. They are probably looking for evidence from Wake that they are going to play guard and not be stuck in the post.