We did something like this on our first "family" trip a few years ago, when our oldest was still below 40 inches. It was a very fun trip.
We spent most of our time in MK and AK. If anything, we probably over-planned the trip in terms of FP strategies. Thanks to rider swap, you can basically have double FPs for the height requirement rides if you want them. My wife and I still had fun riding a few things by ourselves, but it was more fun to stick together as a family. I think we gave away about 15 rider swaps by the end of our week-long trip.
We had one minor "disaster" when my wife was stuck in Soarin' for an hour, with no cell service inside. Meanwhile, I was having fun with our two little boys, riding Living with the Land, then running around Innoventions and meeting Chip & Dale, but she was stressed over the time it was taking with a ride malfunction.
I would relax and not push stuff too hard - for example, even if your daughter is over 35 inches, you might still want to skip Barnstormer. There will be plenty of time for thrill rides (that are better than Barnstormer) when the kids are older. I would use FPs on the big rides for the parents that you won't be riding together for a long time (so 44" and 48" reqs, like RNRC and Everest), and then use other FPs for character meets and just a few prime rides, like Peter Pan, Safaris, TSM, etc. I might skip the experiences that take awhile, like Soarin' and Test Track - even with a FP, those take over 30 minutes from entry to exit, even without any unusual delays - since you'll be able to do them with your daughter on the next trip. Instead, just let your daughter lead the way around World Showcase.
If we had it to do over again, the things I would "rope drop" at that stage would be the Boneyard, the Dumbo play area, any fun character meets without FP (such as Chewbacca), the Seas aquarium and Turtle Talk, and the Pangani trail. All of those are much more fun (for both little ones and their parents!) with fewer people around.