Better update notification
This notification doesn't look great in the new layout due to the very similar title and description, and lack of content icon. This is GNOME OS nightly, updated yesterday:
In this case adding an icon and shortening the title a bit should be fine, but I'm not sure how many other notifications we send from Software, but it might be worth looking into how they all look with the new layout.
Also, I wonder if we should tweak the spacing on the notification bubble a bit for the no-icon case? Vertical spacing between header and content looks a bit too large.