Currently, when you add the logo as a graphic element to the template, it only allows you to zoom in. However the default logo size that it imports is already too big. Either change the default that gets loaded in, or allow zooming out. Inevitably the logos are clipped.
Also, it would be useful to allow non-square logo images. Many logos are rectangular because they're the company name + an image. Right now this gets cut off to the point that a modified logo is all that can be used.
The vast majority of company logos are not intended to be contained within a circle. It would be most beneficial if the logo could be posted as the company has designed it!