I think the work that goes into creating a new course tends to be massively underestimated. Add a new course? Just like that? OK.
Around a quarter of a million photos, who knows how many hours contour mapping, putting it all together, testing (granted, 5 minutes seems to be the norm there) and let's not forget, the course owners have to say yes.
We're likely to get 1-2 courses per year and then probably ones that are currently, or have already, hosted a major.