I also agree and support the suggestions. Zoom in/out would be great. The font size for street & route names/numbers are too small to be of much use. You can't read any of them while riding.
When displaying the next navigation instruction, top left, you also display the following navigation instruction below in smaller font. When displaying the next waypoint, top left, the next navigation instruction is removed/missing. Can it be added to help with planning upcoming turns etc?