SE already answered that the current system will remain because otherwise it would require too much calculations from the servers to deal with real time, high dynamic damage counts for 72 persons. I know this sounds odd because they already display the total damage at the end of the fight so they already compute the data but no clue about how they deal with the data during the fight (with kills filling lb bar etc)

Even if its not really satisfying ill keep the current system rather than technical issues.