After upgrading I lost the root.
And I couldn't put it back the way it's described in the first post of this thread.
But now I got it back.
In the mean time I factory reset the device too.
The Super-SU was not doing its thing. And everytime I would go into it it would ask to do it again. Which it means that something was not getting installed properly.
I think what broke it through was that I logged in the Google Play store at some point (didn't do that before) and Super-SU got updated and then it worked.
(However I also poked into all the buttons in the Root Master out of desperation).
Long evening ...
And I really don't see any changes due to the firmware upgrade :|
And the dictionary is still not working
