No, if you have blue eyes, you are still Void/blood elf and for your roleplaying purposes, you can pretend to be high elf if that suits backstory of your character. That is the point devs had regarding new customizations. They even admited not all these features are canon and they did not reflect actual lore being added to the game.
So, it's ok for your blood elf characters to be actually high elves, if you wish so, but that does not make any Blue eyed blood elf NPCs high elves, nor does it make neutral high elf characters Horde when they are on the Horde territory.