In iOS 11, maps is enabled with an option to search inside an airport or shopping mall. Maps can help you find a terminal, gate, restaurant, restroom, shops by category and more. Under the location, categories are listed to further look inside the location. User reviews and can be viewed for a particular shop or business. With the internal layout provided in maps, it's much easier to have look at shops, facilities and services available nearby to the specific location.

It'll be better to check if the locations service is on for specific apps unnecessarily. It not only consumes data but also drains the battery faster. You can turn off the location service at system level for all the apps and turn on only when needed. However when it's turned on, it'll be enabled for all the apps that have location services on which will in turn consume data and battery. 

It's a better idea to turn this off for each of the apps and enable only as needed. You can see this setting for each app at settings -> Privacy -> Location Services.

As far I know there is no direct way to print out a Facebook post or comment from the app. I noticed this when I wanted to take a print out of  one of the useful posts. Only way I could able to take a print out was to copy the post text into notes and use the print option from notes. Surprisingly notes could retain all the formatting from the Facebook post as is and came out good in the print out. Once the wireless printer is set up in your phone, you would want to do all the print out only from phone. Hence It’ll be helpful to include print option as default in all the apps.

By default IPhone organizes the photos as collections which are named  by the place or date of the photo was taken. Another easy way to access specific photos are through ‘memories’ that are grouped with easy to recollect titles. If these are not enough to get the photos organized then you can create your own albums with easy to remember name. Save all relevantly photos into the specific album for easy access when needed.