I agree with @jameskoster's comment on resetting. I expected to find the "Reset" control within the new group block's background image panel. You can reset it within the tools panel, but it feels necessary (and familiar, i.e. the Site Logo block) to have it here.

Another note (related to #53997), we should consistent on "Clear" vs. "Reset".

We're using "Clear" within the color palette popover, but "Reset" within the tools panel. Same follows for the Cover block's "Clear media" button.

Current:

Expected: