UI would be a bit friendlier if; 1) The changes were more responsive. The delay is too long when scrolling and hovering over an element - should be around 100ms

UI would be a bit friendlier if; 1) The changes were more responsive. The delay is too long when scrolling and hovering over an element - should be around 100ms or so. If it takes time to load the content, show some visual signal (loading... or similar) that state has changed. 2) You could mouse over and click on each of the items.