Thanks for the feedback everyone. There were quite a few discussions and "pre-DIP" documents internally over the previous year that covered some of the ideas above in the attempt to balance various factors (usability, security, flexibility, openness, accessibility, etc.) and be in alignment with the whitepaper. Your comments have been seen and there continue to be some discussions regarding the details to ensure future-proofing.
As with the previous Evolution-related DIPs (2/3/4), development initially occurs in the private repo and moves to the public one later so the lack of visible Github activity can be attributed to this. For example, you can see some
public DIP-related PRs here.