You've just made everyone's point who doesn't need a 4th Anakin form, you compared it to Barbie... Nuff said.
Look, I'm a feminist & there are a ton of things that I absolutely loathe about Barbie, but there was also a book titled, "Adios, Barbie!" (later changed to "Body Outlaws" after a lawsuit from Mattel) for a reason. Whether I happen to like Barbie or not, she's an icon. Mattel may be condescending and anti feminist, but they sure as heck know how to make iconic toys.
If the 4th form can ever be fairly compared to Barbie, it won't be because Vader is portrayed in an anti feminist light. It will be because we're still playing SWGOH 50 years from now, and multiple generations of kids grew up loving the character and obsessing over every small change to his animation with each client update.
Saying that this version of Vader can be compared to Barbie isn't an insult to Vader. If anything, it's an insult to Barbie. But I'll treat it as an insult to neither: just a statement of, on the one hand, incredible optimism or, on the other, a statement not so much about SWGOH and Vader, but about the entire SW universe and Vader. Because in the latter, despite SW being younger than Barbie, there's a much better case to be made that multiple generations of kids have grown up obsessing over Vader and they still, to this day, debate which version of Vader is better, etc.