I still don't get what scares people off about sliders. A couple of years ago at Brodaks, the winner was someone with a SIG Skyray, no slider, He didn't go extremely fast or slow, but landed ever time. Other people have done the same. A slider does not guarantee success for the beginner. Better to practice landings, that seems to be where most people have trouble. In fact we have had steady growth in Sportsman, 15 profile and AMA profile at Brodaks, how many contests can say that?
Yes I understand that beginners stunt has a simpler pattern, but not necessarily a simpler plane. In fact it looks to me like many of them will take their plane to the next level. Allowing sliders in Sportsman opens the door for the same option.