Add the possibility to stop a user from deleting an image/folder in the ImageBrowser connected to the Editor. As it is now you can stop it serverside, but there is no way to prevent the folder/file to from being removed on the client.
Add Link Tab to Image Editor The idea is to add a link tab within the Image Editor that allows users to wrap the image with an href. This would cut out a step for people who want to add a link to images. (This functionality is available in the ckEditor)
It would be extremely nice if the "Insert Video" was added to the Editor. I know there are "hacks" and workarounds that make this possible, but it just doesn't have the right feeling to it. The editor in WordPress gives plenty more options to insert a video, and it's easier to use than the hacks/workarounds.