Another update of EasyStreetView for BB10 (2.3.0) has been submitted to BlackBerry World today (so it should be available after the weekend). This new update provides quick access to Directions and navigation.
On the Settings screen you can choose Directions provider to be used: BlackBerry or Google. This setting can be changed anytime. Once any location is selected in the application on map, you can tap the "Directions" button in the Application menu to get directions.
If "BlackBerry" is selected as provider, directions and route (from your current location to the selected location) will be shown in the native BlackBerry Maps application and from there voice guided navigation can be started with one tap.
If "Google" is selected as directions provider, Google Directions is shown in the web browser - in addition to directions (list and map route) you get Google Maps with all layers (including Traffic, Bicycling, etc.), POIs, user reviews of POIs and other information.
EasyStreetView for BB10 is available in the BlackBerry World: http://appworld.blackberry.com/webstore/content/36957888/