After removing the image from the article, physically it remains on the server (directories /src and /thumb). After some time, there will be an excellent dump of images, relevant and not. What about the option - the deleted images from articles also deleted from the /src and /thumb?
Is it possible to make load the images for each article into a separate directory? The name of the directory, for example, can be as the ID of the article.
1) Yes, maybe it is better to use ids, maybe it will be hashed item id, e.g. e0a70f72bdae9885bfc32d7cd19a26a1
But, usually, we create an article title and alias just one time. Even we change it, then we can re-upload an images.
2) Sure, it should delete all images of the article. It is already in the plugin, but it was some issue with paths which will be fixed in next release.