It would be very handy to be able to paste images in line in feature descriptions, not just add attachments. Images often compliment the story at a given moment. Attachments are also cumbersome to what is otherwise a quick process.
You are going to like what's coming shortly. Stay tuned for a beautiful new editor with additional controls including the ability to add images inline. Thanks for the comments on this one.
I'd also like if the entire editor were more robust (like for example Atlassian Confluence), so images, tables, etc. could be easily accommodated. We find ourselves still having to attach MS Word documents to capture and would much prefer to have everything "in line".
In addition to inline, I love the idea of drag and drop images (like Trello) so that you can have assets that aren't shown as icons, but rendered with mouse-over options that make them large.
I worry about spending too much time with laying it out in the description (sizing, etc).