I've been too busy actually playing Classic to care what the forum warriors from retail are spinning. And here in their homeworld / base camp that is mmochamp they are still in outrage mode. I could go through how my game experience differs from your list but why bother at this point? I do agree that raids are not harder and are unlikely to be the focal point of Classic WoW. However, if you think the game outside M+ and raiding is better in retail, I don't know what to tell you this late in the game.
wowrealmpopulation has BfA active characters level 10+ at 1.7 million for the 4 regions Blizz actually makes their money from. Is it possible there are less than a million active subscribers there? Should've been more concerned about the state of live WoW and less worried about Classic. No matter how you try and spin that here, once the money stops flowing in like it used to, and even with the micros and other ways to get more $s/customer that is the case, Blizz won't be paying for raid content at the same pace they have been.