I didn't say I liked his take on Ra's. But DC is a place where magic does exist and his League is a world-wide organisation that should at least attempt to employ the best assassins it can.
It took a chapter or two for the Outlaws to put them down. Better then the usual collective manpower of the League sans Ra's would fare against just Batman in one page.Plus, Tynion's league didn't fare better and was quickly dispatched off panel.