I always wonder - why no one from open source community has created better stats module? Is there something in the license that prohibits creation of modules that overlap with Nginx Plus?
That's true for any functionality provided by modules and there's plethora of them. Also, Nginx has support for dynamic modules. Recompiling Nginx always worked out of the box for me too, so it's not like a big issue.
One thing that comes to my mind is that maybe this can't be solved by a module due to missing API in open source Nginx.