Nowt wrong with a bit of character as long as it's wear rather than neglect or abuse
Nice work with the gears; the original setup sounds pretty horrific tbh ! Incidentally, what doesn't get neglected in favour of a CdF? Since I got mine it's done about 25 times the mileage of my road bike.
How do you find the "Biopace" chainring? Can you even differentiate it from a normal one?