I would suggest adding a live map to the app; similar to the map feature in the Dead Rising 3 SmartGlass companion.
Not only would it help guardians navigate around the map, finding the quickest path to a particular location, but it could also include indicators showing:
- Where your fireteam members are in relation to your position
- Resources that your ghost may be configured to detect (spinmetal and such)
- Other guardians near you
- Etc.
...the list could go on. Perhaps even a 'drop a pin' feature to navigate you via GPS to your desired location...Destiny is set in the future after all...the technology is available...lol.
Just some thoughts. I found it pretty useful in Dead Rising.
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That's all it need is a map how they miss that lol