An opinionated take: https://medium.com/@dmitriid/in-which-i-complain-about-elixi...
That said, I would say most everything that Damien says here and is not already labeled as fixed remains an issue as written. Erlang is an exceeding conservative language community, from its telecommunications heritage, and its syntax has hardly budged from when it was first written.
I’m skeptical. It seems more likely a new, larger community will form (probably has formed) but I think anyone sufficiently dedicated to have used such an obscure, weird language prior will stick with it.
(I may be projecting a bit, but as someone passionate about Erlang I have minimal interest in Elixir.)
With those syntax improvements, we get the power of Erlang with the ease of use of Rails: http://www.littlelines.com/blog/2014/07/08/elixir-vs-ruby-sh... (A bit dated, but this is the post that sold me on the platform.)