But they are making new rules they think are better. Only instead of just forcing them on us, they are giving us a chance to try them. Which to my mind is a much better idea than just releasing a new book and realizing it just alienated a large portion of their audience.
I mean ... in fairness, they did try this before!
What, too soon?
Seriously though- this is exactly correct. It is unclear to me what the real complaint that most people are having is. Just in this thread, we see one set of people (such as Micah) grumbling that the game is too popular ... like it's a bad thing. That WoTC shouldn't be designing for "the masses," but for what's good, or, at least, for what Michah wants.
Then you have GMPG. Their contention is that none of this matters- it's just luck, man! This could've been OD&D with the LBBs, and people would be eating it up because it was on Stranger Things. I guess if you're really against the whole idea of "System Matters," that's an attractive proposition, but....
In truth, it's not that complicated. They have a popular brand, and they are devoted to giving the consumers what they want. While it is certainly true that there are times when people have great breakthroughs and give consumers something they didn't realize that they wanted yet (the iPhone would be an example of this), it's also true that if you're making a broadly-popular product and a market leader, it's generally a good idea to make something that ... wait for it ... PEOPLE LIKE.
Which means that you're not going to be "cutting edge." You might not appeal to the most hard core people. But you will appeal the broadest popular base. That's what D&D, and 5e / OneD&D is trying to do.
ETA- And I admit that I would love it if, for example, WoTC released an updated Dark Sun with REAL PSIONICS. But I'm also not holding my breath. I don't see them doing that anytime soon, which is why I'm glad that there is a vibrant 3PP market.