Can you add the feature to allow zooming while cropping? Sometimes precise cropping is needed, and we can’t do that when the image is fit to window.
Also add the ability to flip or mirror an image in crop. Many times slides or negative film is scanned incorrectly which makes the image reversed (left>right). Flip or mirror fixes this. Flipping also can be used creatively. It is included as a tool with almost all photo apps.