I was the latest mapper who did a survey on the ground. An indicator like tracktype was far enough to describe the road quality. Everything more (like lit=no) is useless overkill judging the situation on the ground, not even worth the discussion about it we are having now. 
I agree that tracktype=1 does not imply smoothness=bad. What I meant is that two road quality indicators on that 'road' are overkill and nonsense.