I work as a Geologist and collect plenty of field data with the ios app. I have been an Evernote user since 2012, and only discovered the Atlas/Maps view shortly before the removal of this feature.
For those working with spatial information being able to view your note locations on a map is incredibly useful. This feature has applicability to earth science disciplines, sales people, field contractors, tradespeople, travellers, restaurant reviewers, and really anyone who collects information outside of a single fixed location.
It is disappointing that such a useful feature was removed. If the feature was removed due to lack of a user base, then I suspect many people were unaware of how useful this feature was (like I was).
Returning this feature would certainly make me renew my premium subscription.