However the issue is that we cannot know if the attack space has been broadened or lessened as a consequence of this disclosure, because of how eager it was. If it wasn't eager then we could much more comfortable in suggesting that the attack space has probably been reduced.
Given the exploit had been living in the linux code base undetected for so long in the first place, I think its fair to state that disclosing the exploit prior to the distributions being ready and given the distributions are the principal attack vector of the exploit: that the researcher has made the situation worse and should reflect on their actions.