Regarding rooting problems on 5.1.1
I fixed this problem with rooting 5.1.1 last week in my Android Toolkit
*HERE*. The problem with SuperSU not showing in the Apps bar is fixed if you adb install the Superuser.apk file that was used to root. If you have already rooted and have installed the
Toolkit you can go to section 19 from the Main Menu and select the Superuser fix (option1) to extract the Superuser.apk and adb install it. Android 5.1.1 is also fully supported with download/flash/root available.
I did post in Chainfires
support thread to let him know about the 5.1.1 rooting problem but I guess he has been away on a well deserved break.
Mark.