Hi there,
It would be very good if you could tweak the image/file preview size for asset gallery blocks like you can on the media tab with the slider for size.
We figured while working with a client that the preview size of the images is sometimes very small to be able to distinct similar image quickly and forces us to wither zoom in on the page, or have to quickly an image to check what image it is, which can be time consuming while trying to reorder images.
Thanks for all the help!