Yes, the Lp gene is simply that tricky if you take the gamble. I did so with a bay based few-spot leopard stallion with my Friesian mare and got a rabicano bay colt this spring. He is the sweetest thing and will make a lovely dressage horse. He's for sale...anyone????? If he doesn't sell, I will still be proud to own such a nice horse. He will be gelded in a few months.
There is a woman in my area that breeds Friesian/Appaloosa crosses. I have always admired Friesians, but I must say, this lady's crosses don't impress me. It could just be her program, but they are just ok for me.