You hit the nail on the head. I find it quite irresponsible of Goldstone to give his personal opinion in an op-ed, while the whole issue is still under investigation. Did he consult the other members of the commission before writing his op-ed?
U.S.-led coalition conduct 23 air strikes against ISIS in Iraq and Syria (Reuters)
from the article: Hamas: Goldstone retreat doesn't negate war crimes committed in Gaza