I'm beginning to believe that this is in fact an "enhancement" and not just a glitch. We haven't heard anything from Delta on the matter, and an actual glitch should have been fixed by now.
I would understand the move if the map was blocked to non-elites while there was no FCM offer, but to block easy viewing for those who have a shot at an upgrade is just another move in Delta's race to complete opacity.
If an app update comes out in the next week or so, we'll know for sure. I certainly won't be updating the app until absolutely necessary.