The reaction to SSA showed that the damage control (basically trying to let it drag so long that people get enough from it) failed.
The worst part is that even if soojin might be revealed to innocent, no one will believe her due to cube’s paradox handling of the controversy and the bullying by the fans.
I don't think Cube did an attempt at damage control. Damage control is about releasing promp statements to appease people's wrath, which is the opposite of what they did. They took their time, and I think they did it this way because they needed time to collect evidence and find what the hell happened exactly. For some reason they stood with Soojin in her plea of innocence.
So I don't even know what they should have done differently, besides throwing Soojin under the bus in a quick manner. (Which they might end up doing at some point anyway, who knows.)