I certainly have! But personally I love the Erlang syntax, for me it fits the mindset of Erlang perfectly. However that statement reflects what I've seen and heard often on the topic.
I am certain he has heard of Elixir. But Elixir is not a better version of Erlang, it is simply a different way of writing programs on the Erlang VM.
Considering they are also using Clojure, LFE, or Lisp Flavored Erlang, might be a better fit than Elixr with two Lisp languages. It too has seamless interop with Erlang.
That's a good point, and it does look like a cool project