Earlier quoted context omitted.
This is, to some extent, what Feedly did. They started off as a really nice, somewhat niche magazine-style news reader built on Google Reader. When Google Reader shut down, it was in their best interest to implement the API themselves. They had the very clever idea to make that a _public_ API, just like Google Reader, so in the end all kinds of apps and services wanted to use it, and it seems they're doing really wel…
Feedly was amazingly positioned for that. Their two signature featuers were: 1.) it looked and worked almost exactly like Google Reader, and 2.) it could import your Google Reader feeds with one click. Within months of Google announcing Reader's closing, Feedly had acquired something like 8 million new users. Amazing stroke of fortune for a well-deserving product. I still happily use the free version.
And 1) I don’t understand. Feedly was one of the first ones I tried, and none of the settings I tried got me close to a headline-only view that I used in GReader. I used Newsblur for a while and am on TT-RSS nowadays. But Feedly always seemed to cater more to those people who enjoy image-heavy subreddits and full-page hero images, or pinterest.
Nothing I tried with Feedly got me a simple, no distraction one-line, click to expand downwards view.
Note that all of this was around when GReader closed, no idea what changed.