Interesting Ideas I would Love. Please add to this.

[Iscah]

Thanks for ruining a fun post by destroying it. Considering the fact everything mentioned is do able.

No it isn't "all doable".

As she said, there's no visual difference in the majority of races you're requesting, with lore being the only distinction. Ishgardian Elezen characters ARE Wildwood Elezen NPCs in the game programming. Kai-Shirr is a Miqo'te NPC even if he'd tell you he's a Mystel. And so on.

It wouldn't make any lore sense to give players the choice of races by their names in the First, several expansions and a literal world away from learning about them.

And Garleans are their own thing but I personally doubt they would become playable. They are primarily modified Hyur and Elezen models in any case.

I'm not going to pick apart everything, but "I can imagine this being a thing" doesn't automatically make it possible.