A few first impressions:
For Default and Horizon:
- Like Keegan, the spacing feels a bit tight to me
- Having no shading in the negative space between items makes it feel busier to me, compared to when that all blended together
Horizon-specific:
- On Horizon, the items’ background have color – should there be? (On Default, its now gray).
- On Horizon, the rounded corners in the top left look off to me… the container looks sharper than the items within – on Default, it feels like they match better.