Therein lies the current problem with any kind of limited brushless class. The rules are perhaps too open to interpretation right now to create fair competition among manufacturers in a limited class, like 13.5 or 10.5. Is the answer that an organizing body gets together, defines the rules, and then waits for companies to make motors that conform to them? Do you base the rules on the most popular current design (Novak) so there's at least something that can be used in the class, and then wait for other companies to catch up?
None of this means as much in mod, but in a lot of cases, a majority of club racing is stock or 19T, so there's clearly a strong demand for a spec brushless class with speed that's similar to those two.