The AB FFP has lost itīs magic since the enhancements from last November. Up to then AB was a pretty good choice compared to LH as they offered similar priced (often cheaper) tickets and gave out full miles even for the cheapest one.
Last November they changed the rules and will now credit only 125 or 250 miles oneway on their cheaper tickets for domestic and European services. In general (earning/spending chart) they offer now more or less thes same as LH but without the nice status perks (no lounge access, no priority luggage, no partner network) so gold status is IMHO pretty useless - as the whole program is, unless you are flying them frequently on longhauls, better in longhaul Business or buying the flexible tickets.
To become more attractive they are in strong need to find partner airlines or move to an alliance.