first I want to say, that your application is very good! I use it since 2011 or 2012. Mostly to navigate on my bicycle while touring accros Europe. To do this, I'm using the free version of the MFN with OSM-maps. With each version the navigation and routing will be better! Thank you for this!
And now my questions / asks for features! :-)
I'm starting with a WinCE device. So I know the feature to toggle on or off the self created *.mca files. This is possible inside the PC version, too. Now I'm using the Android-App and it's not possible to do this. Why? I miss the feature, cause I have a lot of self created *.mca's with hotels and other POI's.
The second feature I miss, is the ability to config the number of roads I can see in higher zoom levels. If I zoom out, from a certain level on, I can see only big roads like high ways. In others navigation apps (or devices) I can see more roads at the same zoom level (the smaller roads are vissible only as a 1 or 2 pixel wide line, but there are vissible). This feature will be great, if you want to plan your own route by setting stopover points inside the map.