I think it is kind of dumb to score a round dead even, as there is almost always something that will seperate one fighter in an individuals eyes. When you think of how subjective scoring a round is in the first place, you should always be able to find something that would make you give the round to one fighter or the other. The real problem is with the president it sets over the course of a fight. If you have two fighters who are very evenly matched, like you said Marquez Pacquiao being a great example, it might be tempting to score the first round 10-10. But what then, if all the rounds are fought in a similar fashion after this. Surely you'd have to score them even as well? Suppose the second round was even closer(no round is ever dead even when you account for personal preference really), do you go back and think well maybe I should have given the first to so and so?