You can't just clunk it back and forth and think excessive play. I get about that much driveshaft rotation on a new setup. You have to lock down the pinion gear (driveshaft) and only look at the play between the fixed pinion gear and the moving ring gear. The call is for .005-.008" or so. In general, yours does not look too bad. Your slop might also (and more likely) be drive shaft u-joints.
The best way I found to check u-joints is... Put the Jeep in gear/park, then while laying under, use a foot on a tire to get the Jeep rocking back/forth. Everything will have to tighten/loosen in opposite directions. Feel around the u-joints and pinion for any motion that shouldn't be there.