Have you taken your ribbons into account?
I.E. 3 points for a kill in Bodycount medal.
All the ones i listed above give no points and have no medals to increase those points from 0. The point i'm trying to make is that so many team orientated actions such as reviving a teammate, dropping health, diffusing a bomb and capturing an area give you little or nothing, which begs the question why bother?
I've never been given health, this is because everyone had probably already got the medal (which is damn easy to get) and moved on. As an ability it's very useful to other team members but it gives the user nothing, so why bother? (i know why people SHOULD bother, as i always give out health, but no one else does)
I've often seen people plain ignoring a planted bomb when they're standing next to it, opting instead for kills. One gives points but only benefits one player, the other gives no points but benefits the whole team. In the big picture diffusing the bomb is clearly the thing to do but people often just care about being at the top of the scoreboard.
The maximum number of points (with medals) that can be given for completing the 'big' objectives would be:
Planting both bombs that then detonate: 8 points
Downing and killing the assassination target: 8 points
Compared to TDM points:
Killing someone in TDM: 3 points
Headshotting someone in TDM: 4 points
As i say, i have no problem at all with TDM, it's just the fact that the rewards for doing something more significant than killing a guy are just so insignificant.