I agree - and have said this right off the start of the new struggles - while the teams are more balanced numbers wise, they aren't always balanced template / skill wise, which is where the underdog bonus should come in, to help make it semi-competitive all the way through.
There is a mechanic in place that allows you to catch up, a kill against the currently winning side, can net big scores in a landslide, but they are never going to turn the tide of that battle, without being able to get into the match 30 seconds sooner, or using above gm weapons/armor. I don't really want to see the late arrival come back, just because people used that mechanic to unbalance the matches, by losing on purpose to get more people in, then winning in come back style.
Also - make the minimum points scored for a kill, 5 points - it's ridiculous coming out of the gate, getting a kill, and scoring .3 points..