"If it looks like a YF-19, walks like a YF-19, quacks like a YF-19..."
I don't personally care that the VF-19Adv differs from the YF-19 and its lineart, but comparisons are going to be made, whether one likes it or not. Long-winded internet rants aren't going to stop that.
Even if Arcadia didn't get Kawamori's stamp of approval... so what? His stamp doesn't magically make a shitty toy into a great one, or lack of a stamp makes a good toy into a crappy one.