Hi, I flashed the 1,4 version for now. perhaps I will update with 1.4.1 but for now I will test nmy new powerful !! S7.
For the titanium SD Card write problem works following solution for me:
Go to Preferences -> Backup Folder Location.
Click on Storage provider at the top (it's not obvious that it's clickable).
Click on DocumentProvider storage. That will take you to a File Manager interface. You may have to click on the 3-dot menu on the top-right to enable the (external) SD card to be shown, then click the menu lines in the top-left and select your SD card, and click the "Select" at the bottom right. (You don't have to select your Titanium Backup folder here, you're just using this to get access to your SD Card.)
Now you should be back in Titanium Backup and you can browse like you used to to get to your preferred backup folder on your external SD Card
Nice Rom !