I've been comparing the iPhone SE with the iPhone 8 and the bigger screen doesn't help that much.
Also, I've tried clipping using the Article Mode and whilst the text flows appropriately, the font is a little bit too big but the worst of it is the margins are far too big. But it varies from website to website as to the size of the margins.
As a result of this observation, when clipping a simplified article, I'd also add there needs to be a feature to control the margin size in addition to controlling the font size and making sure the text flows correctly at the margin boundaries.