It's simple. Moving the stick is not required in Directional. I played a months worth of RTTS last night an barely used the direction controls at all.
It has been said before and I'll say it again. Directional is not a simplified zone. I don't believe pushing the directional control to the outside of the plate and then swinging at a pitch on the outside increases your chances of making good contact, that is still based on timing of the swing. All it does is try to influence the direction of the hit off the bat.