That is a much more challenging task - even if they had planned it from the get go. One of the reasons people gravitate to Emacs is that it is much easier to build integrated systems like Org mode.
The other barrier, of course, is that it doesn't really benefit existing Org mode users/developers.
I can't help but feel like it would be a lot more widely accepted if they divided it in multiple projects each with their own goals and requirements.