Just FYI, if Disney was beholden to iconography, then they wouldn't have race changed iconic characters like Ariel, Peter Pan, and soon, Hercules. They don't care as much as you think they do.
The iconography argument doesn't hold up when all it translates to is white normativity, since almost every icon is white. You can't simply ignore the (racist) context for why this, if we're going to have an honest conversation about race/representation in adaptations of decades old material.
Also, just becuz you're a POC and you're against it, does not somehow move the needle of consensus for how the vast majority feel (I'm Black but would never mention it unless it was relevent). The vast majority of young Black girls are going to be over-the-moon that Ariel now looks like them. And it's not cheap, it's not a "hand-me-down", as I've some people say.
It's corrective promotion of icons; diversifying their catalogue and evolving these characters. Shedding the racist limitations that were placed on them for who and what they could be, when they were made.