Hi there.
I have found a way to get to the advanced setting using widgets generated from novalauncher, however it is not working for many common settings like changing wallpaper etc. I have tried to install stock android lollipop settings app but it couldnt be installed, in my opinion it could be in conflict in current trimmed version of settings. Can someone of software developers take a look into this? maybe it is probably possible to install after deleting the stock app? I havent found any 3rd party settings app for android 5.1. Please take a look into this, cause there is too many missing options in default setting app.