I never ran into any issues with using all of my FSA money. The changes make it a little harder, but if you estimate what you're gonna spend your FSA on, it makes it easier. :)
FSAs are great to save on so many different things like bandaids, blood pressure monitors, wonderpants and breastpumps for your baby, shoe inserts, contact lens solution, and you can even get sunscreen. A friend of mine recommended this site, fsa store, that sells only
fsa eligible products and they have free shipping for orders over $50.