This is another place where there was a race, High Elves, in the game which hadn't really been represented on player characters. Blood Elves were the closest, but had felt green eyes. It was an opportunity where we had a number of elven races, and we could tie it back to their roots, letting players choose where they want to align and what fantasy to play out. We did have a lot of discussion about it, ultimately we might do more in the future, but for now we're providing the option to have a few High Elf customizations available.
Ely Cannon Art Director of world of warcraft
https://www.wowhead.com/news/shadowl...ith-art-316803
green eyes blood elf
blue eyes high elf
Unless you are a developer, what you say is not real blizz information, the real and valid information is what the developers say.
Thalassians with blue eyes are high elves and are playable on both factions as customization