I think the article preview would be more useful, at least to me, if it was inline with the comment preview and remained on-screen with a long tap. Reading and scrolling while having to hold the long tap is cumbersome. Granted, it's a preview feature, but I think it's a worthwhile feature to be able to easily read an article straight from a feed and then go back to the feed. Which is why I also like the comment preview.

For those reading and wondering about the mentioned features, it was introduced in v1.471, which is a beta so you would need to join that to use it.

EDIT: Not sure why but this post only shows a sliver of the article for the preview. Loads fine in reader mode and other article previews seem to load up the full article.

I realized some people may have reader mode working, so the typical preview gesture is preferred for them because accessing the article through reader mode is just a tap away.

In my case, I don't have reader mode on because this also requires links to open in a custom tab or the internal browser. But because both will show ads, despite uBlock Origin, I stick to the external browser. And why I made the original post/suggestion. If extensions would work with the custom tab option, then I would use reader mode.