DH and I were in WDW July 4 - 8. I would echo all of your observations. So many recent posts have mentioned the poor behavior of other guests and we just didn't see it. Parents were conscious of their children, most everyone waited for their turn, picked up after themselves, etc. I would add that we saw an unusual amount of construction/refurbishment. (We'll get to see the results on our next trip!)
The one thing that even my husband commented about, and he is typically less than observant, was the behavior of many of the CMs. While no one was rude in any way, many seemed to be less "into" their jobs than we have experienced previously. Truly cheerful, attentive CMs, who seemed to be in character were the exception rather than the rule. Some examples - at Small World the CM at the entrance was reading/looking at a park map instead of greeting, or even looking at, guests. Several times, two would be standing together, having a personal conversation rather than interacting with guests. As we checked into our resort, our feeling from the CM was that she was just doing her job. No feeling of welcome at all. Most were polite enough - just not that friendly. I don't want to sound like a complainer or imply that anyone was unpleasant, just stating a difference that we noticed. The outrageously wonderful interactions we had on our first couple of trips was one of the reasons we fell in love with the place and have returned so often. Of course, we'll be back!
We were there the 9th - 15th and I totally agree about the CM's! No one was rude, but we saw a lot of "people just doing there jobs" rather than looking like they LOVED their jobs. Still absolutely love it there, but as you stated, it was a difference that we noticed.