Asik is the best player released but he wasn't the worst decision. His release was a great decision. Korver is the worst (best?) combination of player and decision in my opinion, however, in the scheme of things, it's not a big deal. None of the bench releases were. You're simply not going to go into the tax any further than necessary for neither a broken season nor paying role players for that broken season.
The Bulls' lack of cap space just completely handcuffed them. There's no way around it.