Sync Source with Shelf
It would be a great feature to be able to sync one's shelf library with owned materials in the Source. Having just upgraded pcs and forgot to back my library up (opps) I find myself wishing I could just poke a button to get all my Source materials into my shelf without having to go identify each one and poke it to download. This would be a great way to get any updates to existing materials as well. It would probably be more efficient as well since it could be hitting your servers at whatever speed is optimal to not overload things. I kept clicking too quickly and had failed downloads. As more of us are multi-year subscribers we can have a huge number of materials so this feature becomes more needed as time goes on.
Another reason this would be useful is that when picking out new materials I have had the system stall on me and appear to lose one or more of the material downloads and then i have to go find it and download again.