Yes, I was at the park today.  Ironically, I made a reservation for this day way 
before it was announced to be the reopening day, and before I knew there'd be a heat wave, lol. 
 
But in short, the park is now essentially exactly like it was before the pandemic.  No more reservation checks, members have a separate entrance and can get in 15 minutes early, they are refilling mugs directly instead of giving you a cup, and filling all rows on all rides.  Wait times today were pretty minimal, which I credit to both the full capacity on rides as well as the scotching heat driving a lot of people away (the park did not feel very crowded at all).
Still absent, as far as I saw:  still no Freestyle Coke machines yet (they are still covered), maybe only 1/4 of the drinking fountains were turned back on, and as far as I saw, there was no parking tram/bus.