Give an option for the user to type in the preview size when adding a photo? Right now the preview looks really small.
Automatically optimize images when adding them to an article to reduce file size, loading time and bandwidth. Like how Oxwall did it for their photo plugin. When clicked on, the image opens up the original size.
Include option to add Alt text when adding images. This is great for Google Image search and SEO.
Fix distorted cover photos on article homepage.
Allow HTML view.
Include "Top Rated" and "Most Discussed" tabs.