No comment to your huge post or other concerns, but as of wireless-testing from 2.6.32, wmaster0 is no longer created by the mac80211 header stack. wmaster is as it sounds, a master device that normally "controls" the udev interfaces.

What David has provided is a backport of compat-wireless to 2.6.28 so a lot of changes since then to the current version have been incorporated as well as his own wl1251 patches.