I’ve been thinking about this a lot and I have to agree. When I wrote this topic, I was only thinking of aesthetics and not the actual user experience. Even though the two-column icon boxes look much better, I’m not sure if it’s worth changing only on mobile because of the inconsistencies and readability issues 
As small click targets on mobile are the only problem to solve here, we could simply increase the sizes of the boxes by a fixed percentage (not as big as the screenshot) and keep the layout as it is:
