It would be very helpful if we could view in-flight statistics while piloting our crafts. I find it frustrating that I have to switch to map view to see what my apoapsis is. By the time I've maneuvered my mouse around to where I can actually see my apoapsis I occasionally by-pass my targeting apoapsis or I lose slight control of my craft.
I understand there is a mod, Kerbal Engineer Redux that displays in-flight statistics. However the mod hasn't been updated in about a year.