Forbes put the roster together. He put last year's roster together. He is not and was not hamstrung by players leftover from Coach Manning.
This particular year, the injuries to Ituka, Carr, and Monsanto obviously had a major impact. That being said, the impact took the team from a ceiling of maybe a 9 seed in the tourney to missing the NIT. Its not like this team was going to be "good," as in a top 25 team, on its best day. The lack of playable centers made that certain.
I said it before, but he gets next year. If he doesn't make the tourney (and, if I had my druthers, show a path that involves the development of players over time) then he needs to go.
I have no idea what Currie will do, but that is my vote.