I'm not privy to premium content, but from what I've gathered about TJ, he'll make the best decision he can for the players and team.
I'm guessing (again, no real knowledge) that with the team that was coming together, TJ didn't feel that Rasir would fit, which would not just be bad for ISU, but also be bad for Rasir. I'm also guessing this might not have been decided by TJ until some of the commits started happening and he got an idea of what the team needed to look like to win.
It's only been one season, but my doubts are being quickly erased about TJ's decision making when it comes to roster. He seems to be making the best teams he can with what he has, while also keeping the players' interests at the forefront (i.e. developing for pro play where needed).