Have you used any in an official game yet? I am currently in-talks with my DM to allow VillainTheory's aberrant elf in his upcoming Forgotten Realm's campaign. He's hung-up on the "Mary Sue" potential of a unique race. I mean, they don't have angel wings or heterochromia, so I'm not sure what the problem is...

Well Mary sue basically refers to a character's ability to outperform or upstage the rest of the party.

This race seems like an improved/variant/specialized version of high elf. A specific wizard cantrip and made "special," a natural weapon instead of weapon training, and short range telepathy instead of a language.

I can see your DM's concern. Innate spellcasting of one of the most versatile cantrips. A weapon as good as a shortsword that can't be taken from you. And the ability to communicate with anything that knows a language. Even the ability score improvement is the one any class can benefit from.

I can definitely see this race adding too much  versatility to one character.