Perhaps with some franchises Square Enix simply needs to take a different approach. They need to realise that some series, like Dragon Quest or Front Mission, won't be putting up numbers in North America like any game with Final Fantasy somehwere in its name. At least not immediately, not until they can build up an audience.
Maybe they just need to release games in lesser known (less popular, less mass makret, however you want to phrase it) franchises in limited print runs. There's obviously an audience for such games here in North America, they just rethink their expectations and their strategies for releasing them.