This issue has been helped but not entirely fixed with the preceding fixes. However, working pretty good now overall. Was able to switch download folder from internal to ExtSD in some apps (like Browser) but not in XDA app and torrent initially..
However, was able to move download folders and files over from internal to ExtSD OK.
Also, changed permissions on Browser, rebooted, and then was able to change download folder to externalSD. Ditto for uTorrent - downloading to ExtSD now also.