I will disagree with Les,
Takedowns usually do win matches. He pointed out a few examples but for the most part it is the first takedown that means who wins. I could go on forever about why this is true but its not worth it. As for riding time, I think it certainly would encourage stalling. Unfortunatly referees would be less likely to call stalling if they thought a wrestler was trying to get riding time. Come to think if it I really don't know why I get myself involved in coversation that ultimatly have no point. I can say with just about 100% certainty that there will be no rule change invloving this anytime in the next, ohh rest of our lives.