I was there the same week, 21st to 29th and didn't find the crowds overwhelming, it was managable, using fastpass and early mornings. I have been in January (very quiet) and early August (quite busy) and this was somewhere in between the two. There will be waits sometimes of 30 to 45 mins for headliners, but if you fastpass the rides that are most important to you, and ride the quieter rides while you wait, you should have no problem seeing everything.
BTW, DO NOT go to Food and Wine Festival on the weekend, you will not be able to move, see it in the week and it will be very quiet. Same goes for
MNSSHP, you will have very short ride waits at the party if you go in the week.
It is a great time to go weather wise (although it got very cold at night) and not bad crowd wise. Go and have fun,