The new NicheIQ Topic Suggestions tool is an interesting idea. I looked at the suggestions though and there are lots of unhelpful suggestions - most of them don't even have anything to do with my niche.
This uses machine learning, right? So it would benefit from getting feedback about its suggestions. A simple thumbs up/down would be great. I'm not sure if the current "Hide this" is the feedback mechanism, but that's really clunky. Make it easy to give rapid feedback.
Note: I posted this in the SEO section, but realized it should go here.