Agreed. One of the many things that makes Phoenix/Elixir great for us rails/ruby refugees is that it's built by other rails/ruby refugees. In many ways, we have all the good things that our old masters DHH trailblazed with rails, but at the same time, very little of the mess that also came with the trail-blazing.
That being said, I do miss active_support though; Elixir's utility libraries (fox, pipe, croma, etc.) doesn't yet have all the easy automagic that made rails so simple to develop on.