Well, back from our trip and just wanted to give a recap of some things if it'll help anyone out with planning.
Safety/security - in general very good. Mask compliance nearly 100% all the time. Crowds very low, easily able to socially distance. Even in long lines, did not ever feel crowded. Cleaning is top notch right now. When you get up from eating, they are there immediately to sanitize your table. The one hiccup as people have said is Disney Springs. Felt very crowded there last night. World of Disney was packed. Might think about avoiding this, especially at night.
Park experience - if you are a "ride" person, it's heaven for you. In 6 days (with a half day spent at SeaWorld), we rode every ride in all 4 parks except Nemo and Triceratop Spin, had time to do multiple rides of about 10-15 favorites, and still left the park each day about 3-4 hours before closing. Just tremendous.
Masks - got used to them with the heat. I felt like heat is bad no matter what, masks really didn't make it worse. It did start to irritate my ears toward the end of the trip so you might want to look at those ear savers. The mask relaxation zones are nice, but I'm not sure completely necessary. Tomorrowland Terrace is the only one we ever used. When we wanted a break, we got a snack and a drink and it was always easy to find an out of the way area under shade or cover and take our masks off and rejuvenate.
Dining - QS was not hard once you got used to the concept of putting your order in before you got to the restaurant. Never hard to find a seat. Table Service was probably the only negative part of the whole trip. Meals there always seemed a little off, I suspect with staffing issues and new servers not used to their restaurant. Things just ran slower, but still not a problem by any means.
Resorts - really felt empty. I know there was worry about them being full, but Grand Floridian Villas did not have that feel at all. Parking lot was the emptiest I had ever seen it. Pools not crowded at night at all.
Transportation - monorail was very empty every time we rode it. We drove everywhere but MK. Lots open around 45 minutes before park time and they let you into the park right then too.
Will note my tips for RotR as well. Got it both days at HS at 10 AM. Probably had the VQ joined within 5 seconds each day. Main delay is getting your party right. Figure out in advance how many of your Friends and Family are there with you that day. If it's over half, just Select All and then remove the ones that aren't. Have someone count down the seconds from an accurate watch/phone if you can before 10 on the dot. Start refreshing that page a couple of seconds before it starts. If you do all that, shouldn't be hard to ride. We got BG 13 and 17 the 2 days.
As a final note that's unrelated, I'll just throw out there that we met vlogger Michael Kay for the first time this trip. He really does seem like the nicest guy and just like he is on YouTube. He saw my kids waving to him while he was on the phone (with Dave!) and he immediately hung up and came over to talk to us. Asked all about us, where we were from, what parks we had gone to, what rides we liked, any dining plans. Talked to us as complete strangers for at least 5 minutes. Then, later in the day, we saw him from a distance on Main Street. He was doing some sort of filming on his own when a couple walked up to him (likely with no idea who he was), and asked if he would take a picture of them in with their camera in front of the castle. He quickly stopped his own filming and obliged. Like I said, just seems naturally nice.
So anyway, a good trip, as I said on a post during our time there, if you're on the fence about going in the next few weeks, I highly recommend doing it. I really think anyone would feel safer there than back home in "real life" unless you're truly just sheltering every day at home.