Jester David
Hero
I'm sorry, but, isn't this largely the Pathfinder model?
A couple of rule books per year, with most of the material tied into the Pathfinder modules? Aren't the modules themselves about half module and half rules and setting material?
So, this year you're getting the Rise of the Dragon Queen which has lots of Forgotten Realms goodies, much of which is being added to the Basic Book. Next year we get ... Spell jammer (just for giggles) and we get Spelljammer stuff added to the Basic Rules.
What makes you think that Thri-Kreen, for example, won't be added to the Basic rules?
Keep in mind that the "Pathfinder Model" was also the planned 3e model until some key staff left or were laid off, and the plans changed.