Description
I believe threejs should adopt a similar kind of tags as many projects are using right now to guide people that want to help to the project.
For example in https://github.com/aframevr/aframe we've: help wanted (easy) used to tag simple bugs or feature requests focused on newcomers to start contributing without being overwhelmed or afraid to take a bigger task to start with. We also have help wanted (hard) for harder issues but that will be easy to spot for people that have the knowledge but don't know where they could do to help to the project.
Similar approach is used by the https://github.com/servo/servo project and many others.
I feel that when newcomers or more advanced users come to three.js, people don't know where they could help to improve the project so many interesting features needed by the engine are left undone because people don't know what is needed to be implemented as here we don't have a clear roadmap.
So you should read all the issues and try to guess and measure what you could do.
Starting with a tag as proposed, let's say as the one used in aframe or whatever you feel it could fit, people could just filter by these tags and start contributing.