[pedant]All FTOs (and TRTOs) became ATOs on 8 April 2012 and must become fully compliant with Part-ORA by April 2014.[/pedant]
According to our CAA Inspector, as of last Monday, no former RFs had been approved as ATOs, although a number of applications had been rejected. Given the financial penalty, I can't see why any RF would rush to become an ATO - the only advantage is the ability to offer the LAPL.