if curation is improved, then those content creators who are currently submitting great content which isn’t getting seen, should stand to benefit as that content will be more likely to get unearthed.

that is an assumption

curators that are investors are going to be looking for the best ROI; they are not necessarily looking to provide the best curation

We have three competing interests here: curators that curate, curators that invest, and content creators.

All three groups have valid concerns.

I really don't see any mechanic that is going to make investors curate; time is an investment as well.

A final note, as the bulk of my return comes from creation in a niche area, I don't like proposals assigning more return to curators, especially when the nature of the platform is that some curators are investors...but that's my bias ;>