fall leagues are like that Halloween candy you're dying to eat but you know once you start you're getting one doozy of a belly-ache. i learned the hard way, because bad habits are harder to erase than keeping good ones, which she can work on at home with a tee...look, in a game, how many pitches do you see per at bat? maybe 2-3? i'd take a couple of hundred swings off a tee in the basement over sub-par, JV pitchers any day (unless your DD is 10, 11 playing in a 14u league or something)..,.proceed with caution
play spano, ft. wayne tourneys in winter...maybe a team camp would do wonders