One useful feature might be for the index to show one-sentence blurbs about each paper (in addition to the title of the paper itself). Unless I'm reading papers very specific to my subfield, I need some context to know what I'm looking at & why it's important. Otherwise I fear that only articles with the most accessible titles (or disciplines whose titles tend to be most accessible) will be clicked, read & upvoted.

I would hope that the nature of the type of people who read scientific papers is to avoid sensationalizing too much (like popular science journalism does).