WaPo's opinion editor is leaving a year after a controversial shake-up. Read his memo to staff.

The Washington Post's opinion editor is leaving after about a year. Kevin Carter/Getty Images The Washington Post's opinion editor said he's decided to leave after about a year. Adam O'Neal was hired as part of a shake-up pushed by owner Jeff Bezos. O'Neal said under him, the opinion page became "more relevant, accessible, and consequential." The Washington Post's opinion editor is leaving after about a year. Adam O'Neal was hired as part of owner Jeff Bezos's push to champion "personal…