I know this would be hard to pull off but I kind of wish we could see the small / medium / large views of each component as a preview.
Right now it's not possible to tell what would happen when any of these components were resized since it's just a static image as a preview but responsiveness is one of the most important things to see.
> They've implemented that, and have size sliders for some of the components.
It seems they've only done it for the ones they are ok with making freely available.
But that still leaves a vast majority of the components (almost all of them) as static images at 1 specific screen size.
They should consider adding screenshots of each size, or a few second gif / video showing how it looks at various breakpoints. Otherwise potential buyers (like myself) have no idea what things look like at each size. I don't mind a premium price but I'm not going to blindly buy it without knowing what the components look like beforehand. What it looks like is the most important thing for a CSS theme.
Right now it's not possible to tell what would happen when any of these components were resized since it's just a static image as a preview but responsiveness is one of the most important things to see.