Its interesting to note that at SFSTL the waterfalls still work. When their Rapids waterfalls fake rock section collapsed, they found a way to fix them. Since redoing the rocks was cost prohibitive, they instead added a new themed wall with the waterfalls coming down from the top. So, it leaves only SFGADV and Great Escape with non working waterfalls in the chain.
Holly, the course cannot be changed, but you can make the ride faster by adjusting the water flow from the pumps. Hope you get your cast off soon!