I would think something like this would or could be written to be less complicated but on a similar manner in the way this addition handles it, it would add sizing, alignment, text wrapping etc all in a nice neat package.
I know that 'other' side has started something along these lines and although it didn't work 100% correctly you could see where they were headed with it.
Their attachment manager allowed you to upload images and then reuse them as needed though out the script. You could also resize them, align them, wrap the text etc.
Since you guys have a great Gallery maybe this is something you can work towards in the coming releases.. an all in once place for attachments and images that allows for full customizations within the post.
Jamie