There's a reason its played in the fall throughout the rest of the country
TV -- I don't think soccer will move to the fall at all due to King Football. As far as I can find, these are the states that play spring boys soccer: AK, AL, AR, GA, IA, NE, OK, SC, TN, UT, VA, WA, WY (and there are even more girls states, i.e. NC). I, too, think soccer will stay in the spring and perhaps more facilities devoted to soccer-specific play.