Main reason I don't exclusively use RSS (like I used to) is tons and tons of websites just provide a couple lines in the RSS feed and not the entire article.
That's always been a complaint about RSS going back to its original age, the balance between short summaries and full articles; ads/pageviews/analytics versus "content is king".
Have you tried an RSS Reader with an embedded web view for those types of sites?
(I use Newsblur and it has a really neat view where it shows the original blog/page and uses a bit of logic to track your cursor to mark as read articles you read directly on the originating site in a frame inside of Newsblur. It doesn't work for all sites but the ones it does work for can be pretty magic. That said, I'm an old school "river" user and simply have a habit workflow that heavily makes use of keyboard shortcuts to open new tabs and close them quickly.)
Have you tried an RSS Reader with an embedded web view for those types of sites?
(I use Newsblur and it has a really neat view where it shows the original blog/page and uses a bit of logic to track your cursor to mark as read articles you read directly on the originating site in a frame inside of Newsblur. It doesn't work for all sites but the ones it does work for can be pretty magic. That said, I'm an old school "river" user and simply have a habit workflow that heavily makes use of keyboard shortcuts to open new tabs and close them quickly.)