These 2-way roster spots are really part of the overall depth. I suspect all 3 will be suited up for the NBA team a fair amount. I see it as a big part of why the team is willing to go with a 14-man roster. Most games, they will have one of these (3) 2-way guys "called up".
All 3 of these guys can be an emergency fill in right now. All 3 have the potential to develop into something better. You have a small guard, a mid-sized versatile forward, and a big. I agree that the window on Amari Williams is starting to close, but he is still a decent option for a big on a 2-way. PHI has Tacko Fall, for example. There just are not a lot of good options.