One of our biggest issues in the past has been that whenever our customers rename a folder or move files to different folders, the files have to get reuploaded to Cloud Storage. In some cases it happens every month for 50-60GB that the client decides to reorganize. The re-uploads take days to complete.

I just did a test using version 7 with client-side deduplication. I uploaded a directory with 5 GB of files , then changed the name of the folder, which in prior versions would have resulted in a complete folder re-upload.
Instead, I got 100% deduplication - it took a mere five minutes for the entire plan to run, and I still ended up with both folders in Cloud Storage. Total upload amount? 417KB.
This is going to be very valuable for clients who frequently rename folders or move their files around.
Just gotta reupload everything using V7 File Format, but once that is done we will benefit greatly from the client-side dedupe.