One thing we can conclude is that Rove saved journalist Cooper from going to jail by allowing Cooper to reveal his source. But Froomkin wouldn't concede an honorable motive on Rove's part.
Many WH connected (and honorable) types have long ago (LONG ago) signed waivers and for their trouble the media alleges the waivers were "coerced".
The release you're thinking of that Cooper claims he got at the 11th hour was not from Rove. Rove had signed the waiver over a year and a half ago.