My Sig Cub has flaperons, ,and I rarely use them. It has the barn door ailerons and putting the flapernos down actually causes washin. It can lead to some real exciting takeoffs if you let it get too slow and uncoordinated. The only time that I use them is to put them up to slip into a tight place on landing. Putting them up adds to the washout and makes the plane more stable.
I think that adding real flaps and making it a Super Cub.