Honestly? I think the current setup is actually better for the game than when the focus of WotC's money-making efforts was selling D&D books. 3.5's massive pile o' books and 4e's... well, 4e (I loved 4e, and I desperately needed it to renew my interest in the game as a whole when burn-out on 3e hit, but it was a mess and kept growing into a bigger one) were the outcome of WotC needing to sell books to turn a profit on the brand.
Because if you need to sell game books to make money, you're going to keep putting game books out. Quickly - too quickly. And each one is going to need to have something in it to sell it to every group of players, because you need to make as many sales as possible of each book.
Now they don't need to do that. Now, D&D makes money by being something people want to license and use to make other media, and it does THAT by providing high-quality ideas and inspiration and by being a brand that people want to be associated with. "Hey, look at us. We inspired basically the entire fantasy genre. We're objectively the best. Come, pay us to use our name and our IP in your work, for you will profit and we will happily take some of your money to let you."
I much prefer that over Sword and Fist.