If you don't mind a minor lag at startup, and more memory usage, you can `npm install -s babel-cli babel-preset-es2015-node5` and use `babel-node` ... setup a small `.babelrc` file and you're off...
I usually do that at the start of prototyping something in node, often it's "enough" ... I find that async/await is worth it by itself.. add in destructuring, fat-arrow function expressions, and it's really worth it... I'll take easier to reason code with a little tooling over trying to do vanilla node/js these days.