Welcome @patrickroberts! I think this would make for a great addition to Beman.
Check out the Beman Library Maturity Model. Generally, for a Beman library to get to the “production ready” it needs to implement a target paper without significant deviation, but for the “under development” phase, deviations are fine.
I suggest making your implementation a development phase library right away. If the authors of P3411 don’t like your suggestions, you can publish your own WG21 paper (we can help with that) with your suggestions. Once the paper is published, your library is free to move into “production ready”.
We have a couple ongoing prototypes that aim to help bootstrap Beman libraries which may be useful to you. Mine is here and Zach Laine and others have one here.
If you want to go ahead, say so and we’ll add you as a contributor to the beman org which will give you permissions to create a new repo.