If you go to Baidoa and speak Af Maxaa, you will get blank faces. Even if it's shifted closer to Maxaa, Af-Maay is still largely unintelligible.One thing about Af-Maay though is that it is moving in the direction of standard Somali (Maxa).
Af-Maay of the 1800s was more of a true different language. The Af-Maay of today has shifted closer to regular Somali.
I notice the same pattern in minority languages in Europe. Today they are heavily creolized with the standard language of their country (think of Basque, Breton, Frisian, Catalan etc).
The schools all across Somalia should only teach in Af Maxaa, we already have clan divisions, a linguistic and (eventually) ethnic one will make Somalia much more volatile than it already is.