What's the plan here?

Personally... I have no idea, but you can follow progress on GitHub, until I make an actual FAQ.
I am not actively working on this project while I am not using myself, I will aim to fix any bugs that are reported in a reasonable time frame.

Upgrade path to Factorio 2.1 & then future features

There is no priority for me to update this mod at the moment, despite its glaring incompatibility. An immediate hopeful target is to update it before the end of the first full week of November with the version patch, with future development being looked at some time after the new year rolls through.