Hello, I tried your plug-in but after activating it I couldn’t set image sizes. They all resulted of unchangeable fixed size. I could change sizes on the editor, but on the post preview image sizes were all off. Disabling the plug-in fixed the problem. Otherwise the plug-in did allow me to set default link image to none, which was what I was looking for.
Hope this feedback can be helpful. I’m using wordpress 5.9.2. Bye!