there are a lot of ways to get bonus points
for example, get 5K points for every 100 kills with a weapon for a gold star
also, it's so fucking aggravating that DICE can't release what would seem like a quick fix to team balancing. just got DCed defending Valporaiso Rush, but before that it was 12 defenders vs >16 attackers starting from the very first 2 objectives to the last two. no idea why I stuck around except I just kept bitching about teams and no one bothered to switch to the defenders the entire time lol.
on a side note, my knife was the only weapon that seemed to work when I joined Nelson Bay a round near the end