Isn't this something that should happen automatically or at the very least on a scheduled basis? Regarding the "Other" growing, it went from about 700mb to 26gb as I was backing up my SSD (not in the pool) to the pool using EaseUS todo backup. Then I used Carbon Copy Cloner from a macbook to backup to a shared folder in the pool, this added roughly another 22gb to the "Other" section.
It's interesting to note that this morning my "Other" section was showing 1.6 GB after my nightly incremental backup ran. I manually re-measured and the "Other" section went to 60GB! I tried re-measuring again with the same result. I then rebooted, re-measured, and it went back down to 787MB. The fluctuation is always between the "Other" section and "Duplicated". It's a little concerning that this is happening, I wish there was greater visibility into where these numbers come from.