Meh. Diecast was cool and all, back when I was a kid and every toy was potentially a weapon to be thrown at my little brother. Today, I can really live without it. Give me a toy entirely molded in one color anyday, as opposed to parts painted to match plastic. And as far as the $$$ is concerned, collectors should just resign themselves to forking over large amounts of it every time. That's sadly the nature of the hobby.
And as far as the "innacurate sculpt" is concerned, the only difference I've seen pointed out was the changed cockpit. For all we know, that may have been mandated by Kawamori. That whole biomechanical aspect of Zentradi mecha only appears in DYRL, and he may very welll have retconned it back out of continuity.