I workout regularly and have for quite a few years.
a) I don't track the numbers, I know what I lift without writing it down.
b) Overtrainer is a bad name...as mentioned. Over training almost never happens and has a bad stigma. People have difficulty getting TO the gym, not staying away.
c) I don't see it solving a problem. How many people do you know that say 'I wish I could have better charts of my lifting amounts'? Or 'I wish I didn't workout as often'.
Sorry for the negative feedback, but it's sincere.