I tried doing this and there were some issues. I just unpacked the .kodi/userdata folder. That seemed to have worked fine. However the guisettings.xml caused my 4k screen to display as 1080p, leaving me with 25% to work with. I fixed that with:
Code
systemctl stop kodi
cd /storage/.kodi/userdata
mv guisettings.xml guisettings.xml.bak
awk '/<resolutions>/ {print " <resolutions />"; next} /<\/resolutions>/ {next} {print}' guisettings.xml.bak > guisettings.xml
cd $OLDPWD
systemctl start kodi
Oh, and don't forget to extract your .ssh folder, almost locked myself out
Also deleted the Addons33.db, to prevent x86 plugins to reinstall.
That was it for me