Possibly.
Since the SFB background (which I also have) isn't necessarily always applicable to SFC, it's hard (at least for me) to say whether or not it should be the final arbiter of what "looks good" in a game that is based upon SFB, but is not itself SFB.
As always...models are a matter of taste. They are there to add visual appeal to the game. Within reason, I'm personally quite comfortable leaving behind "SFB" considerations in favor of what looks best to me. This is why I am very happy to use Atrahasis' C5 model for all my KDN needs and skip the rest of the, IMHO, ugly KDN models out there. In terms of Klingon models...if it's not done by Atrahasis, P81 or Gow, I'm generally not interested based upon what I've seen in my 2 1/2+ years as a consumer of the SFC2 product line. I was there, like many, ast the start of SFC1, but never bothered with changing models for that game.
Your mileage may vary, of course.
As i've mentioned before, the only reason I don't use your model pack is that I don't like many of the models you've chosen. That's why I'm very happy that you have a "no model pack" version that replicates what I already have in place and allows me to pick and choose other models I might wish to use given the expanded model pointers. My main interest, then, is to seek out corrections and additions based upon what I see is needed. Hence my original query about the KFF model being replicated by your installer to serve as the model fo the HF5s when you're using the KDD model for other F5s.