The Bush administration should perhaps shoulder much of the blame for bin Laden's freedom, for not commiting enough troops in Afghanistan after the attack (which is where intelligence reported him as hiding). Instead, Bush decided to attack Iraq and the rest, as they say, is history.
What seems to worry many, who have left the CIA already, is what appears to be the politically motivated actions of Goss and his team. According to reports, one of the team members, Patrick Murray, has been accused of applying pressure on the CIA, when he used to work as an aide on the House intelligence committee. Apparently, he tried to force the Agency to declassify certain information that could be used against the Democrats.
Many who have left the CIA recently had considerable experience in their fields and if this trend continues, those that remain will be people with political views that support Bush and the Goss team, and probably have limited experience.
Instead of making the CIA stronger and more capable, Goss, in just 2 months, has begun to destroy the Agency he was appointed to help. It may end up more under the control of Bush, but probably won't have the right people employed to be of any good to him or anyone else.