Interesting. DD who has only recently started throwing the rise ball has only tried to throw it high in the zone. Next time we practice, I will see if she can throw a low rise and see what happens. She may very well keep it high in the zone and have to aim lower to find the correct release point.
BTW - had a well respected D1 player swear to me and DD that she had faced pitchers in college who started the low rise out of the strike zone that "rose" into the zone by the time it reached home plate. While I am not going to debate the issue, it was a very effective pitch against her and her teammates.
Thrown properly the low rise is very effective. I would definitely work on throwing it low as it is much easier to then bring it up.