I've already posted a few observations the past couple of pages, but I had a couple more to add: (our trip was 9/19-9/23)
Both DH and I remarked that the standby lines were much better without FP+ - when we went in the past, we were in line 45 minutes for TT and during that entire time only 7 people were allowed in. When the fp line would almost empty, they would allow a couple of standby to get on, then there would be a whole batch of new fp holders show up. The only way we advanced is that others in line gave up and left. No exaggeration. After 45 minutes we gave up and did single rider. Interested to see how the new system will work with standby.
We use the Lines app, and it will give you a more accurate wait time, as well as advise you to wait and ride later or ride now. That helps a lot.
Rope drop and later evenings are definitely worth it. Even if everything isn't a walk on, a 10 or 15 minute wait ensures you will get a lot done. Mid days are HOT, crowded, and busy. Get there early, break, then come back. Lots of crying, overtired kids. A couple of times I felt so badly for the kids; they were beyond their limit and so utterly miserable.
Knowing some of the rides helps as well. There are some rides or attractions, where you can rest or cool down. People mover, Carousel of progress, Hall of Presidents, at MK, One Man's Dream, Muppet Vision, Beauty and the beast, at DHS, Imagination/Figment, Spaceship earth, the attractions and films in certain countries in the WS at EP, Tough to be a Bug, Lion King, Feathered friends in flight at AK, to name a few, are great ways to cool down and rest. I remember my son sleeping in his stroller during the American Adventure. When families get tired and hot, no one's having a good time, and you're not going to make it through a whole day without rest, especially in crowds and heat. LOL, one of the best things I did at DHS was watch One Man's Dream, because I was so refreshed when I came out.
***Our family is very conscious about germs. We try to distance as much as we can in lines, we wear masks inside and often outside in crowded areas, we use sanitizer every time we see some, we also carry with us hand wipes, disinfectant wipes, etc. We try our best to avoid crowded spaces and don't touch anything that isn't necessary. Use a new mask daily, never reuse one from the day before. Despite this, we have come back sick (sinus, headache, scratchy throat), and are being tested Monday. We are also vaccinated; if you have serious health issues, please think long and hard about this trip. My mother in law turns 90 on Tuesday, and we will not be able to celebrate with her. ***