Understood but Sad,
The Realtek chipset RTL8188CUS were/Are? very popular and worked very will out of the box with RASPIAN. So many PI owners have them in hands.
Realtek chipset RTL8188CUS are also easy to configure as AP in Raspian Whezzy:
That being said, I will try to install hostapd in OSMC and see if I can setup an AP outside of the OSMC menu.
Worst thing that will happen… Re-install 
Ben