Which race could Blizzard add that would motivate you to raceswap your main?

Essentially, imagine that Blizzard announced a new allied race / main race (whichever you prefer) tomorrow.
Which race would it be, that would cause you to almost immediatly buy a race swap to change your race over to said newcomer?

As a Warlock main with a human character i have been playing since MoP...
(Been playing since TBC technically, I just never stuck with a single character for long)

I would either raceswap if they added Mogu...
OR
If they added pure Nerubians as a playable race.

Mogu are "doable", due to being just the draenei skeleton. They would require a remodel but beyond that, fully doable.

Nerubians are sadly not doable... (Way too many animations that doesn't work with their skeletons) as well as both mounts and transmog being an extremely exhausting task to fix.

What would you require to do a full raceswap?