Since there is no way to reliably measure this, I'll decline to wager anything of substance, but I'll live in the comfortable ignorance that half-elves haven't destroyed play of the other Charisma races, it won't overpower the rest of the races.
The hyperbole is strong with this post. I'm not saying they'll "destroy" anything, but being a charisma (or strength or intelligence) based race will be meaningless. Therefore optimizers, even casual ones, will gravitate to races that have the best numbers. It may not have any impact on your personal game or mine. I just expect to see a ton of half-elves in AL. Time will tell.
I'd say that we'll see a ton of mountain dwarf mages, but the prejudice against short is just as strong as the hyperbole in your post.