I've never posted before, but wanted to say I agree with OP. I also want to point out that some players, such as me, have kids or other obligations that may need an indefinite amount of attention on quick notice, thus requiring them to leave the team or not be active during the mission or match. That's another reason that I'd avoid teaming up and just run solo, in case I hear kids or something if my wife needs me; I'm sure there are others in similar situations.