Within the cart cross-selling section (which is great!), the possibility of stacked promotions instead of the carousel format.
As 80% of our customers are mobile users, sometimes too many buttons could be overwhelming, so with the stack/list format, it would be more user-friendly.
Also, with the stacked/list format. Customers may feel more inclined to add more items to their basket. Rather than having them in one row (within the carousel) meaning they feel like they can only pick one.