That might not work for me. However independently of if it fits my needs or don't, I think that the new feature you are planning would have much more value if instead you could replace the icon for other enterprise logo. Because I think that the main users of the REST API will be enterprises. And they like to have their own logo in their CV documents, they feel more powerfull and unique. Just Removing the Europass logo is good but allowing the replacement of the logo would be, in my perspective, more complete.
Even if the image had to respect some restrictions, it would be just fine.
What are your thoughts about it, is it possible to adopt such direction?
I would be highly interested in this solution and maybe I'm not alone :)