I am not sure what carb cycling is. But I was stuck for almost 2 weeks on P2, no loss or gain. I stuck with it and am seeing about a pound a week. I found a fruit in the morning (usuall strawberries) with a good cereal (whole grain, high fiber, high protein, low sugar) and a late day fruit (apple) with low fat string cheese is a good combo for me. Every other day I add a grain at lunch (1/2 Joseph's flax seed oat fiber wrap). Fruit doesn't seem to be an issue for me, but if I eat more than two grains a day I crave grains, and not the good ones.
Also, on days when I work out with a high intensity I know I need to increase my protein afterwards. Otherwise I find myself really hungry and not imaginary hunger.
P1 was actually easier for me, but with a little tweaking I seemed to find what works for me and you will too.