I second the call for this type of feature. I'm faced with moving 50+containers of blobs from the North Central datacenter to a storage account in the West datacenter. I wish I had something that could do this quickly and easily.
+++ AND +++
Don't forget: We need to be able to copy the cache control headers, too.
BTW: Showing the cache control header on a blob is **still** apparently broken or missing for blob properties. How long have we been waiting for this fix ... a year now! Wow. I guess you get what you pay for.