I mean, yes? Absolutely. None of them have alarming or edgy backgrounds, none of them are presented as outsiders. There's little to no suggestion of internal strife. The art depictions are very positive and fun.
There's nothing wrong with any of that, but it is somewhat narrow.
Sure, but that's just doing exactly what I said - the player has to know what they want, and essentially make up the entire concept of "between two worlds" rather than just picking it off a menu. That's absolutely something that requires more confidence, more practiced imagination, and more determination.
To be honest, I think this is a step on a journey D&D is taking, it's not remotely the destination. It's better than entire races being cast as outsiders or the like, absolutely, but neither the backgrounds, nor the species, nor anything else really present the tropes I think a lot of people want, even if they don't know about those tropes until they see them.