I don't think it's actually anykind of pre-discussed and established policy. Actually nobody from FSU expressed anykind of open resistance. Before my reskins emerged, nobody ever proposed anything like that for real. HoL reskins for Operation Templar could be a thing, but lets say it straightforward: FSU doesn't care about Templar at all.
Also, note that FSU allowed custom reskins to happen in form of Leviathan and Lilith thus allowing certain dimorphism to exist, and actually completely altering key visuals of mentioned ships. Also, in the past FSU recolored some Shivan ships to be more homogeneous and consistent as a species.
In fact, I stated that we should keep all reskins away as an "objective standpoint of FSU team member", as I feel obliged to keep some of my personal preferences away, for the sake of goal of FSU.
...but the very existence of this pack confirms, that personally I also disagree with such policy :} .
Huh, let's create a poll in FSU board or something. Very many voices favours the integration of this reskin pack into FSU, as well as making more.