Oh, yes...That's our favorite time of year to go. We've gone down that week (it's different every year) for 4 years. We live up in New York and I'm guessing you do, too, because the rest of the country does not celebrate Jewish holidays.
Anyway, it is The Best time to go! Last year when we went there was a b s o l u t e l y N O O N E at EPCOT. I have video of us just standing around and No One Else around!
The lines are minimal. Sometimes you have to wait five or ten minutes, like on Peter Pan, Snow White and Winnie The Pooh and Buzz Lightyear. But that is NOTHING compared with the lines during peak season.
Another reason we go down during that time of the year is because of the price.
I don't mind spending thousands on our family vacation, but it's not worth it if I can't ride all the rides as many times as I want, or I have to wait an hour to get on every ride.
There's much more personal attention, too.
Have Fun!