I'm no expert, but, the first thing that comes to my mind is that since a snap occurs because the wing stalls, it seems to me that anything that makes the stall speed lower must also make the snap speed lower.

Another thought (boy, that's 2 in one day, better sit down and rest) is that while spoilerons are great while the plane is rightside up, what happens when it's flown inverted? I'd want an aerobat like the H9 Cap to fly the same both ways.