I dont get what you're asking. I dont see the problem wIth overloading a negative at all as long as youre not stupid about it. Pre exhausting the muscle comes to mind. If the question was rephrased to what do you think should be EMPHASIZED then i would say the negative as that is where the most damage to proteins occurs. Ive seen lots of people get big with hndreds of different methods though. If youre looking to compete then it jus boils down to drugs as the most important thing