That leads to my main question:
Why do I need to configure r.i.w.m.p.m.f.ConfigurableWroManagerFactory at all? Why isn't it the default? From the docs, it appears to differ from the default WroManagerFactory by reading a wro.properties file. But I can't really tell, because not much is said about the default, like which processors it chooses, which is why I asked. But if that's all, then make it the default, and if there's no wro.properties, it falls back to the current default's behavior, right?
So it sounds like we should use ConfigurableWroManagerFactory until it's made the default. Might as well say that in the docs and examples, then.