Show thumb image in the preview container

The plugin is perfect. But I think there's one feature should be improved.
When the images are uploaded successfully, the preview images will be shown in the bpfb_preview_container div. But I found all the preview images are in original format, not thumbs. I also check the server side and make sure that there's no thumb file generated in the BPFB temporary folder. It means user browser will open many original sized images which costs lots of memories. In fact, The speed of browsers is very slow when the preview images are shown.
My recommendations are that:
First, when the images are uploaded, generate thumb for every image in the temporary folder and show them in the preview container.
Second, when the images are published, move both original and thumb images to BPFB folder on the server.
Besides, I also think medium sized thumb images are also needed for users because there are more and more mobile browsing. It means original images are too slow and expensive to be downloaded by the mobiles.
I have so many ideas on the improvement of the plugin. In China, twitter like websites have added so many features which are totally different from But people love them very much.
Anyway, the plugin is really great. It should be easy to add more addons to support more types of activities. Keep improving it is great help for all users.
Thanks a lot.