I managed to upgrade with “sfos-upgrade”. Thanks a lot for this script.
Unfortunately I had to uninstall A LOT of apps to have enough space. Probably there were some bigger left-overs from the former try. Also I had the same problems with seemingly lost android apps like sa (Aliendalvik not starting after update to 4.5.0.16 - #14 by sa).
But in the end it worked well. 
It would be cool if Jolla would offer an easier way to change the root size than described here:
olf / SailfishX on Xperias · GitLab
Maybe Jolla could sell a special prepared USB-stick to just plug in, reboot to recovery and start a script to do all the work. I really would pay for it… @jolla
Happy sailing!
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