HR/FB%: 46.7% vs 15.4%
He obviously won't sustain the .200 BABIP any more than he was going to sustain .452, but the other numbers aren't that flukey.
Until/unless Riley makes whatever adjustment is needed to correct those K/BB numbers that were terrible even when he was getting lucky, he will be a fringe MLB player.
His severe problem with swinging and missing pitches in the zone is very worrisome, and I'm not sure if that aspect of the hit tool is something that can be fixed.