Ultradianguy

I'm running into the same issue. I understand that balancing might not be designed to be super fast, but there's a difference between being "not fast" and having a read/write speed of maybe half the nominal speed of the drive, and being so painfully slow that it's literally ~75x slower than the nominal read/write speed of the drives.
In my case, I have one full 12 TB HDD in my pool and added another 12 TB HDD recently. When I test transfers from one to the other without DrivePool (just plain old Windows Explorer copy), I get speeds of 100-200 MB/s. However when DrivePool tries to do the balancing, the Windows Task Manager shows me write speeds of 2 MB/s on the new drive... It seems to me that this is probably a bug that should be looked into.
Because of this I am forced to disable the balancing otherwise it's going to take 4 months...
Please consider looking into this.

I'm on version 2.2.2.934 and have "Check for New Versions" selected.
Obviously, there have been several new versions, but I don't receive any notifications to update.
I've tried "Force update check now" which says if a new version is found, I'll get a notification to update.  I never get a notification.
StableBit DrivePool Notifications is running and enabled at Startup (per Task Manager). 
I don't have "Focus Time" enabled or anything I can see that would suppress notifications.
Yes, I can manually update the version, but I was wondering if anyone had any ideas on how I could get it back to checking for new versions automatically.

Any update on WebDAV? Is there a specific issue preventing it being added? It's been a while...

I've been puzzled why unduplicated content on a drive with SMART warnings and damage was not being removed, despite setting various balancers to do so. 
I discovered today part of the reason - possibly all of it.  I believe all the remaining unduplicated content were backup images from Macrium Reflect.  Reflect has an anti-ransomware function that can prevent any changes to backup files.  This was preventing drivepool from removing them.  I realized this when I shut down drivepool service and tried to manually move those files to another drive.
I'd have expected drivepool to report that files were inaccessible - but apparently it did not know other software was actually blocking it - which brings me to the next issue.
 
Stablebit Scanner reported 20 unreadable sectors on this drive and 3 damaged files.  SMART had indicated 5 pending sectors.  I decided to re-run the scan after disabling the Macrium Image Guard - so far, it appears the unreadable sectors may have been caused by Image Guard and may not be bad.  
Remains to be seen whether the 5 pending sectors will end up being reallocated or become readable. 
The damaged files however were NOT image backups, so it's unclear if there was any connection.
Bottom line:  don't use Macrium Image Guard (or any other similar software) with pooled files.  I may just move my image files out of the pool to avoid the issue.