Pretty much what we saw athletic wise, Rollins and especially Gunter were a liability against speedy receivers, but at least they showed signs of knowing how to play. Randall had plenty of athletic talent to get the job done, but he didn't do the job.
SPARQ seems like a decent tool (although probably no better than the usual handling of combine numbers) to choose between players that are close in other aspects, but it can't make up for deficiencies in technical skill, coachablility, and football IQ. SPARQ is probably best suited to use by us fans.