1. No other team signed Deleon this year. Admittedly, same with Ubaka!
2. Playing the poor card honestly is part of the Hawks. Where that might look negative in another town, Hawks fans are used to it. I imagine they like supporting a team who can often get it done despite that. And maybe Deleon did ask for more and made it an easier decision.
During the 2002 36ers championship, the 36ers had already decided to move from Farley to CT despite the former being a star in an unlikely finals run. Sometimes decisions are made that don't run with what fans expect. Homicide is a classic, recent case.