Okay, so I had my Genius Bar appointment today (actually, I made two of them as the brand new iPad Pro appeared to have a hardware problem: the lightning port is so tight/small that the supplied cable could barely be inserted and was about impossible to pull out). Anyway, they gave me a new cord which is a bit better.
Now, as for Location Services: the Genius' opinion was that it is best never to turn on Restrictions as it will confuse/mess with the setting you set under General > Privacy (if it differs there). He suggested I do not set Restrictions, enable Location Services, and then disable any I do not want under the Privacy tab. So, that is all I was able to get from him.
So, now I am setting up the new iPad Pro. Interesting: I had a 16 GB iPad Air (12 GB showing as available) and had 9 GB left available (used 7 GB). I restored from there and I now have a 128 GB Pro (only 114 GB showing as available) and only have 108 GB available, so I am using 20 GB for the same stuff?????? The old one needed 4 GB for the system and the new one 14 GB - good thing I got a 128 GB model.
FWIW, the iOS Version is 13E234 on the new one and still 13E233 on the old one. Both show 9.3.1 available: old one: 22 MB and new one: 29 MB for the update.