Sure. Though that may be putting your finger on the scales a little bit, since I was pushing for something essentially equivalent in the last go-round 
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I was in fact just thinking last night of suggesting that your points in the earlier thread make sense as additions to the core metadata spec:
Which also dovetails nicely with PEP 621, which is intended to be an input file that maps cleanly to core metadata!
So +1 to the general idea, and I’m happy to be PEP delegate to work out the details.