I, myself is a FLR m applicant and like your wife I am waiting for their request for me to do my biometrics. As far as I know, one of the members here just had her biometrics after 5 months of wait.
Many of the applicant here that done it via post are still waiting for 5-7 months now for the result so it might still be a long haul of waiting for us. No priority or whatsoever on handling visas. Your wifes status will remain even if her fiancee visa runs out this January.
