As per Vallevin 's suggestion, I decided to start a new thread for this topic.
Coconut flour is gluten free, non kitnyiot, and non gebrokhts. It would generally be a better alternative for Passover than potato starch because it is low carb(compared to other flours), contains fiber, and contains protein. The only problem is that it can't currently be found Kosher for Passover. Perhaps, it will be available Kosher for Passover if there is enough of a demand.