Here are my suggestions:
1. To show rendering setting for in progress and in queue screen(see attachment).
2. To have a full size preview for completed rendering - so I don't need to download or see it in web browser.
3. preset for rendering - usually I will do alpha channel to simplify my PS life. it would be great to have a "save as preset" for settings, so I will not forget to check the box 😛
4. Autosave before rendering should save the rendering record including queued render, so when we go to modeling then crashed, the render will continue after relaunch.