So I have seen in the command wheel (i think that is what it is called) that there a multiple objectives to choose from. Some 600 exp and some 20 exp. My question is if an engineer repairs a crane does (or some other important task) does the 600 exp go to each member of the team or does the engineer get all the exp to himself. I am concerned if the exp is not shared whether teamwork will be replaced by justified greed.
Don't forget that as long as you do *something* that helps the team, you'll earn xp. In the container city videos, we can see that by claiming a command center or repairing the crane he got an xp bonus, but if you look at his xp wheel, he would also have gained a continuous xp flow by simply escorting the bot, although which would have netted the most xp is pure speculation.
The good thing is you're encouraged to help, either by completing tasks/objectives, helping teammates or staying on the point, instead of just killstreaking from a distant corner.