Given that I appear to have scared you off and that I ran out of time I decided to drop the hairpinning until both sites are running an ASA. That way I have more of a fighting chance with the routing than I would with the current remote SOHO device.
To answer my own question, regarding the second interface, I needed to add routes for both the remote LAN (which I had) and the remote peer (which I was missing), forcing both to the outside_old interface.
route outside_old 192.15.15.0 255.255.255.0 62.x.x.254
route outside_old 82.x.x.219 255.255.255.255 62.x.x.254