I recently started using subitems and love their mini-grid view style. It's easy to create new items, apply filters, and the "table" visual is amazing. It'd be great if either linked records field could have the same visual and functionality as subitems or if we could copy/paste rows & columns in the subitems field like we can in gridviews.

I don't know if what I mean is totally clear, but to summarize it, each field type has its own strengths, and combining them would be amazing.