Considering the producer likes her a lot, I'd say that is one of the main reasons lol.
But now this means everyone going to recommend newcomers to choose Fubuki since she has Kai Ni while the other 4 doesn't =w=;
Well, Sazanami had her own Christmas CG too. It's not a 2nd remodel, yes, but I think this means the devs won't keep the other starters away from goodies =3