I know it was there Wednesday and Thursday last week… and one other day I forget.
The Unofficial Guide/Touringplans.com is going to be making an adjustment to their crowd calendars. I heard Len Testa on a podcast reporting that the Studios gets much more crowded than expected on Fantasmic days - particularly when there is a gap between showings. So, if Fantasmic is going off Wednesday and Thursday… Wednesday should be very crowded and Thursday will be crowded but better than Wednesday.
Of course, your mileage may vary.