I think players would have been happier with Half Elves if the goal was to quench the Blood Elf thirst.
At least there is already a bit of lore with it; Arator the Redeemer and Vereesa’s twin children (forget their names) just go to show that Human + Elf offspring is not only possible but common.
They could’ve had the Elf model but human ears and non-glowing eyes, tattoos and unique hairstyles, etc. Arator could finally get a unique model too. It could also explain how the scattered High Elf settlements have been able to survive this long, e.g. with the aid of Humans.
That’s just one idea. There was a lot of potential in this area of design but they went with Void Elves instead.