An idea. You have a "Preview Window" scripted into this, which allows you to see what will be done, but that's pretty much the only function it serves. I'd suggest (pending difficulty/possibility in scripting it, and overall need) to add more of a "Confirmation" to the current confirmation window.
What I mean is, if someone does something in batch, like export the art for instance, the window will show what will be created, what'll make a duplicate, etc. But what can someone do if they see something that would result in something they don't desire? Not much, just cancel and start from square one, while trying their best to leave out those that would result in the undesired task.
So, how about a system similar to MM's when it comes to Tagging, Renaming, etc. Be able to uncheck one of the tasks, allowing the others to be carried out as you want, while leaving the undesired task undone. This would prevent from having to cancel out and try again.
This would also help solve my problem, since when I extract to folder.jpg so I get the covers in Thumbail view in Windows, I don't have a folder littered with Backs, CD's, Leaflets, etc. I could simply uncheck the folder1.jpg, folder2.jpg etc and get exactly what I'm wanting out of the deal.
Thoughts? Is it really a desired/needed feature apart from me. Is it even possible? Just throwing the idea out there.