My sense is that WotC is being run in a very corporate, business-first fashion. This isn't the TSR of Gary's days, when it was a bunch of nerds trying to make their hobby into a business, or even that of 2E and 3E, when it was still clearly lead by gamers, even if under corporate oversight. 5E just feels different to me, and in that regard I think Colville's basic idea is right: D&D is more of a legacy product that will adjust only to maximize profits, rather than as gamers trying to experiment with the game they love. Maybe another false binary, but it just feels like the emphasis has changed. In other words, it doesn't quite feel like a living, growing and evolving game, but more of an artifact that they'll tweak, but not truly evolve (for better or worse).