Since Nathan was approved for another GsoC 2020 on the same topic, they usually ask us to move the conversation to a new thread.
an example from Howard on beveling GsoC 2018.
Coding starts June 1st, so there will be a GsoC 2020 Outliner thread made around then, I assume. To keep things easier for Nathan to manage, instead of wading his way through a huge older thread, probably best to keep the ideas for the 2020 thread. Technically, nothing stopping you from posting here though.