By requiring agencies to publicly list all their data that could be made public, the president is not just reaffirming that decisions about disclosure should be based on the public interest, he's also giving the public (and Congress) tools to enforce them.
The U.S. press has become increasingly accepting of officials speaking anonymously. Not identified by name, they can exaggerate and make claims they'd be reticent to make if they were personally identified.
The federal government still has a long way to go. In the mean time, can't the two camps in the open government world peacefully coexist? There's just too much work to be done for us to get bogged down in denigrating each others' agendas.
In 2003, I left a corporate job in management to work on a presidential campaign. I took a two-thirds pay cut. Why? I was inspired by the promise of an accountable and open government by, for and of the people.