I'm kind of on two minds about the whole thing, to be honest. The design itself isn't bad per se. Taken on its own terms, it's mostly fine, though as I keep coming back to, I sincerely miss the tufted cheeks, and can't say I buy needing to smooth them out as part of "SEGA"fiying the design.
But once you start getting into the unavoidable..."politics" feels like the wrong word here, but it's the only one I can think of...surrounding the design, it all gets a lot murkier.
For my money, I don't begrudge Flynn a certain degree of edge in his comments given how extremely belligerent some fans are about nearly every decision he's ever made since starting work on the Comic, nor do I think he's being overly harsh here; even if you disagree with his take on the situation, I don't feel like he's being dishonest or overly-combative, simply stating the situation as he sees it, even if it is in fairly stark terms.
Likewise, I don't think he's being anything less than sincere with his overall sentiment: he loves Sally, he loves SatAM, and he wants to keep them as part of the Book. We may disagree with his choice of methods, but his goal does indeed seem to stem from a genuine desire to keep those elements involved in the story; this is just his way of doing that.
That said, I'm also not entirely in agreement with his logic. I don't entirely see how Sally's design is particularly out of place in the Archie World at large, for starters. Maybe I'm too used to her original look, maybe it's the simple fact that Sal's design
has changed a bit over the years to fit the overall aesthetic of the Artists working on the Book, but the notion that her design is grossly out of place strikes me, personally, as a bit overblown. I don't want to idly dismiss the notion, as this is a very subjective area of discussion, but nonetheless I don't entirely buy it.
Likewise, I think Flynn's comment about how "shallow" fans are for thinking Sal's clothes define her is both mistaken and misses the point. As others have pointed out, first off, Design is
absolutely part of a Character. True, it's not the sum total; Batman's still Batman, after all, whether he's wearing
gray-on-blue spandex or
all-black armor, and I think that's the sentiment Flynn was going for. But it's still an unquestionably powerful part of how audiences identify with a character in a visual medium, and in Sally's case in particular there is a rather important element of it that Flynn sadly ignores.
Others have pointed it out already, but it's still worth repeating: the clothing standards in "Sonic" character design are kind of insultingly sexist. Boys get to walk around entirely in the nude, while girls have to cover up their shameful bodies. Having Sally as an exception to that annoying trend
meant something, and no matter how well-meaning this redesign, it takes that away from her. That's not "shallow" in the least, and I'm a little disappointed in Flynn for missing that.