Membership 2 does not add user roles

Good Day,

I would like to add new WordPress user roles that correspond to my membership access options. I have consistently seen this as the basic function of wishlist member, optimize member, and s2 membership. I am surprised that WPMU Dev has overlooked something that seems to be so important. I guess I just assumed that membership plugins were all the same. Is there anything that can be done? I would not like to have to purchase another membership plugin.

Kind Regards

John