I run rohloff, alfine 11 & 8.
So Alfine 11 seems a more sensitive to torque than the Rohloff and Alfine 11 but I am running a 34 x 23 chainring and sprocket.
As above cable tension is very sensitive but managable, however two areas that affect performance are
1. The cleanliness of the cassette joint, can get gritty if ridden off road.
I keep a spare joint as they are fairly cheap and just clean and rotate.
2. Cones/bearings need to be on the tight side of correct, any play can cause major shifting issues, even if there feels as though there is no play but very free spinning yoh can experience shifting issue.
I also experienced oil leaks when the cones became loose despite two previous years of trouble free running.
However Rohloff if the bomb proof solution.