[MP] Uploading blueprints / Download blueprints

[tetryon]

Our server has a BP book that's absolutely huge - it's a single version-controlled book filled with more books, and many large BPs.
It takes several minutes (often a lot longer) to copy the book over to the Game BP section and does so in the background. It's infuriatingly slow, but it gets there eventually. One unfortunate effect is that at the start of a new map, if you get a dozen players all trying to copy their BPs over to the game bp, things go very slowly for all.

However when copying FROM the server to your local BP collection, it will freeze/lag the server for several seconds for all users. This is very noticeable. It's also a potential avenue for someone to be malicious - copying BPs over and over.

Can any efforts be applied to improving the efficiency of this somehow? And also perhaps showing a progress bar for copying?