I was recently at a camp of a top 20 program. The head coach spent about 2 hours with pitchers parked in front of a rapsodo analyzing their data. On a rise ball they are trying to get 8+ inches of deviation from path (this is measured as vertical break on the rapsodo) at elite levels (most recruits are at 1-2 inches if they even have a rise she said). That's a huge difference for a hitter who can't just look at trajectory. The rapsodo breaks it down by spin efficiency (direction) and rpm. I think we saw this at clearwater where high fast pitches got crushed but a good rise with axis + rpm was still effective. Near perfect back spin is exceedingly rare but possible and more effective than bullet spin for the rare bird that can throw it with velocity.
We have really just started getting into the Rapsodo information. I have a sheet from a top 20 program and they are looking for a +2 on the rise.