I would love it if they removed the wrong-element damage penalty because using F3P in AF3 makes it a lot easier to build up to 6 astral hearts and I hate knowing that I'm technically missing out on a little damage as I do so, but, yes, testing shows that an AF1 F3P does indeed do around double the damage of a UI3 F3P (as you'd expect going from x0.7 to x1.4).