When you say that you are using flaperons,is this being used in conjunction with any type of mixing such as flaperon/elevator?The mixing function for flaperon/elevator makes all the difference in the world as opposed to just using flaperons by themselves.Since this setup is proportional(elevator function is directly proportional to the flaperon function),you don't have to be concerned all the time with air speed verses number of degrees of flaperon deflection(too much,not enough) and the required amount of elevator deflection.This is what gets a lot of float flyers in trouble real quick when these 3 key factors are engaged inproportionately.By using the mixing setup,you also don't have to be distracted by having to look down at your radio while flying to figure out where the switch or dial is positioned and whether it's in the appropriate position for landing or takeoff.I have been using flaperon/elevator mixing on my float planes for the last 11 years and I haven't had one single issue with regards to controllablity or tip stalling using this setup.The takeoffs are a lot quicker(still have to watch your airspeed-too quick is bad news on any aircraft) and the landings are much more controlled and slower.It is amazing how much slower you can fly and still have full control of the aircraft.A simple flick of a switch turns it off or on as need be.Me.....I just leave it on all the time because it makes the flying a hell of a lot more fun.

P.S-Landing slower and gentler on the water(less bounces and skips due to reduced speed)will prolong the lifespan of your airframe and float gear.