I will stand corrected, but I believe IU had stepped up dramatically with assistant coaches salaries, starting with Wilson and continuing with Allen. Are they OSU or UM level? Of course not. But I believe they're now competitive with most B1G schools.
Just as a reminder, Crean was a Greenspan hire, not a Glass fire. That said, in some people's eyes, Glass will never live down the Crean extension. Yes, he got caught up in the "We're Back!" frenzy, and got taken to the cleaners. Then cutting him loose before he did became a problem; early on the buyout was huge, and then in the last few years Crean always seemed to put together an over-achieving team. From any realistic perspective, it would have been hard to justify firing Crean any time before he was.
Will give Glass credit that he expanded the pool from the Bill Lynch era, but Indiana has lost several key coordinators and assistant coaches to other programs. Not saying efforts haven't improved but I still don't think IU is pot-committed.