The Module::Build and EU::MM kits have a problem. They have two kinds of "users", and these two kinds rarely come into contact with each other. The "producers" use the kit to create a distribution, while the "consumers" use the kit to install a distribution. I boldly assume that there are many more "consumers" than "producers". But the support by M::B has not appeared for the "consumers" as of yet. To a "consumer", the extensibility of the module does not matter. The nice structure does not matter. All that matters is that the module gets the distribution installed. If it fails, that reflects badly on the kit. The crux is, that the "consumers" have no interest in the kit. They blame the "producers" for using the wrong kit, but they will not subscribe to the kit-producer-list and will not go out of their way to help the kit-producers as long as there is an alternative kit that does what they want and they can force the "producers" to use that kit.