There are very few comprehensive lists of verification cases for these softwares. This is one which comes to mind. My impression is that the tests are passed on through word of mouth, assuming any tests are done at all. This is far from ideal. A more or less standardized series of tests would be very useful to compare different softwares.

A more extensive section on the RANS equations in different coordinate systems (like the author did with the full NS equations) would be appreciated too. For example, I've never seen the Reynolds stress transport equations in axisymmetric coordinates. They would be very useful in many contexts. I plan to derive them myself early in the coming year, putting them in an appendix in my dissertation.