1. The (MacOS) reader app is not great when it comes to text readability, it's still awkward zooming around (some mags are just PDFs). I always feel a bit claustrophobic when using it.
2. It would be nice to be able to rotate the view 90 degrees to show more of a page at once (see above).
3. It would be nice to lose the damn adds (I'm paying after all): it's usually horrible AI image crap.
I'm always on the fence though, the 'free' version isn't THAT bad and $20/month is on the high side.