> Elixir looks interesting, but the issues it addresses in Erlang are mostly superficial.

Perhaps if you also view the issues Clojure addresses in Java to be mostly superficial, but I have to politely disagree.

> The language has its quirks, but that mostly fades once you're neck-deep in code.

Respectfully, I would argue that the quirks aren't made apparent until you're neck-deep in code. That's when it really becomes painful.