I think the playsets in this line are really nice toys, they are designed better for children in mind than the playsets from even ten years ago. Whether or not recycled plastic lasts, it's probably not an issue they thought about, because these are 'just toys'.
The dolls in this line, from my perspective of a few years of collecting Barbies, are incredibly boring. There has been dozens (maybe a slight exaggeration) of dolls with all of these facemolds. That in itself wouldn't be such an issue, but there is not much variation in the facepaint between the iterations of the same mold either.
But also, as unbelievable as this might sound, it's nice that the facepaint is not pixelated. Because that is a thing with Barbie these days. There are even collector dolls (with a collector doll price tag) that have pixelated paint. Here's an example
@ Flickr (not my picture).
Considering that the essentially blind bag dolls (which is a trend that I hate: how many will you have to buy to get the one you want), Color Reveal Barbies, that were first introduced late 2019, are on their -I don't even know how many-th series, I'd say it's a safe bet that this is just for publicity.
(A Barbie collector hating on Mattel? More common than you think.)