Here is, hands down, the very best advice I ever got about a WDW trip. Better than FP, better than rope drop:
Don't give any one ride, attraction, parade, meal the power to "make" your vacation. It's far better to say "We missed ___. We'll do it next trip, but we had a great time!" than "We saw ___. All 3 kids were brutally cranky, and my husband and I had a massive fight about how to deal with K's tantrum."
Make a plan for the best way you think you can see Festival of Fantasy. But if skipping it and getting back to the resort will work better for your family, skip it without hesitation.
We've never seen it, and probably won't this trip either. We tend to miss the afternoon parades, as we're back at the resort by then in the pool. And no one as ever complained.