User blog comment:EtherBot/Let's Talk Deletion!!!/@comment-27838637-20170211153622/@comment-25947144-20170211163837

Thing is, I don't think it is possible to make the deletion message better. I assume you mean better as in more detailed, there are so many reasons why a story might be deleted, other than plagiarism, copyright and spam, the quality standards compass most of them. More detailed would mean to create more specific separate templates.