Yep, I started it before that. I'd love to lessen the dependency on Babel/Webpack as much as possible.
I'm still using async/await, ES6 modules and some other more experiment ES-next features, so I think it will be awhile before Babel/Webpack can be completely removed. Of course, I don't really have to use those features. :-)
If the babel/webpack builds happen before deployment to Lambda, I'm not sure it really matters at this point... once we see Node > 7 or so drop, with ES6 module support, it might then be time to consider dropping babel, but it's going to be around a while, and still nicer in a lot of ways than alternatives.
I think you can avoid the transpiling/babel dependency.
Great work!