We were at DL October 1 (Friday) through 7. I haven't read all the posts, but here are my thoughts on our experience:
Friday and Saturday weren't bad at all crowd-wise. Sunday was a little crowded, but doable. But Monday through Thursday were INSANE. So glad we were there a couple days before that. Evidently some of the schools were out and everybody and their grandmother went to DL. It was tough to navigate, long lines for both food and attractions, and so crowded that it felt claustrophobic.
On the upside, we didn't have much trouble getting food. We did have ADRs for at least half of our lunches/dinners; the rest we mainly did mobile order and had no problems with that. It was important to mobile order WAY in advance most of the time, generally speaking, but once it was our turn and we hit the "we're here" button, food was ready pretty quickly. We did walk-up at Tropical Hideway at least twice. The line looked long but moved very quickly.
We were also able to get a table at Trader Sam's without an ADR or being on the walk-up waiting list one day for lunch. The app said no wait list was available, but we went anyway and were added to the list. They said they couldn't give us an estimate and I was hoping it wouldn't be an hour plus, but we were seated (inside, as requested) in about 20 minutes.
Lines for churro carts, ice cream carts, etc. were long and moved slowly. We didn't get food from the carts nearly as much as we normally do because lines were so long and it took forever. Probably lots of people just needing to eat and not being able to find anyplace with food readily available due to the new requirements. One exception was the Shawarma carts in DCA. We grabbed breakfast there a couple days with no wait.
We didn't have ADRs for Oga's but were able to get a drink there on the mobile waitlist. We ended up being pretty late for our return time due to being on ROTR, but they let us in without comment, I didn't even explain why we were late, just gave them my name and they let us in.
We were able to get 7AM boarding groups for ROTR every day we started out at DL. Ranged from group 14 to group 123. We didn't get to ride the day we had 123, but that was our fault for waiting too long. We didn't try to ride until pretty late in the day, by that time our boarding group had been called a couple of hours ago. By the time we got there, the ride was down. Came back up and went back down again, then when we went back they weren't accepting anyone else on the ride who hadn't been "kicked off" from earlier. So don't wait too long! The one 12 PM boarding group we got was listed as "stand by" or something to that effect, meaning they might or might not make it that far down the list, and we did not get to ride that day as the boarding groups all expired before our turn.
We also got boarding groups for WS on the two days we started at DCA. First time we actually didn't ride it because even with the boarding group, the line was insanely long and it was HOT standing out in the sun. Why they didn't make more of this queue shaded, I have no idea. We stood in line about 15 minutes, then left. Next time we got a very early boarding group and went first thing when the line wasn't as bad. Personally I would never wait more than 15 minutes for this ride. What a disappointment compared to ROTR.