Love the idea, and yes HAF is perfect for it!
Depending on the order of things, including your work and help, we might get a quick "mvp" out just to get the community talking.
If these alternative feeds (based on seven or more levers that the curator can select) gain traction - we really should build a HAF app. Altho, thats not exactly a hundred dollar job.
Looking at Hivemind, I guess that seems the most proper place for something like this. Since it already has the existing feeds and new ones could be added. I'll ping you on Mattermost to discuss more.