Ability to shift a loop left or right by a number of bars would be good

This is as, far as I know, already possible.
While you are in a loop you can use the Skip forward/backward feature.
It’s available via Keyboard shortcuts & Midi. Unfortunately I can not find a Button in the GUI. You can find it in the Menubar.
Shortcuts are:
Deck 1: 3&4
Deck 2: 7&8
I don’t know if they work for you. Could be that the shortcuts change depending on your keyboard layout. I can only tell that they work for the German keyboard.

Hope this helps you!