Obviously, the Feds would cry, but it might just re-balance things a bit to see at least one thing come out in the Klingon favor first. they can get a Mirror STF or something similar later.
I say this because I'm looking at the STF set bonus idea and wondering how much cooler Fek'liri adaptations to Klingon ships would be than Borg/Undine sets. (and MU ones on Fed ships would be kinda nice too, but that's for another place)
Just a thought... but a Fek'liri raid would be a perfect way to keep the Fek'liri mission arc going.