Romulan ships need some YFA adjustments...
KRCS should arrive at '70 with the rest of the Romulan s-torp refits for Kestrels (the KRL, the SFB KRCS, is Y170).
K9RB YFA should be '72 (the SFB YFA), and the K9R is an unbuilt variant representing a conjectural pre-'70 delivery of a C9 for the Roms to convert (currently the K9R is '72, and the K9RB is '73). As an alternative, especially for campaigns in early-era, the K9R could be made available in '68 or '69, about a year or two after Klingons get the C9, and then the K9RB would be available in '70. The current YFAs are the equivalent of pushing the KHK back a year and having the KHA (an unbuilt KillerHawk prototype w/o the k-refit) come out in its place.
SparrowHawks get their "+" refits in '74 currently...but since we've erred to the early side of many YFAs for refits, the "+" refits were undergoing live combat testing in '72, so I would think it not unreasonable to bump them up a couple years.
Offensive torps on Plasma escorts might be downgraded as well, but these are not nearly as powerful I think, and therefore of minor concern.
Plasma escorts typically have d-racks replacing offensive torps already...part of the reason for the escort downgrade, from what I recall, was to bring drone escorts more to the (crappy) level of plasma escorts. Plasma escorts still suck, and will continue to due so until someone figures out a way to compensate for the missing offensive capabilities of the plasma d-rack. They in no way need to be "nerfed".
The drone escort downgrade to f-racks wasn't especially well received by Klingon players, but really my only complaint is that g-racks haven't been adjusted across all ship classes, only escorts...I've had an idea of a simple system to do so, but I worry it could quickly become a contentious topic, because one race has the bulk of those drone racks.