Thanks for the quick reply Kylie.
Our specific use case for the driving directions would be the ability for our field crews to route from one facility, or electric outage, to the next. Right now the field crews use Collector for their iPad mapping application. While it does provide directions, it lacks some of the better mapping functions that Explorer offers. Some of the more important ones to them are searching our layers, direct hyperlinking, a legend, and easier on/off functionality of layers. I may be forgetting a couple in there too. On the flip-side, Explorer is lacking the editing and routing that Collector offers.
For the crews, who are not the most tech-savy users, going from one app to the other to get directions, or add notes to the map can be cumbersome.
I would like to say, I am extremely pleased with the Explorer app (as well as Collector). The performance and added functionality over the ArcGIS app are tremendous! A great step for Esri.
Thanks again for your answers and allowing feedback.
Jay