I disagree, strongly.
insurgency was really cool, I must admit, but there the weapons are stronger, and more made for long to medium range battles. the teamwork in that mod comes strictly because of the quick kill, because one shot can kill you. unless that was implemented into first strike, which I would strongly object against, there would be no teamwork in such a situation as your mos espa idea, and there would be people running everywhere, a lot of chaos, hardly any flanking whatsoever it would be a battle of speederbike taking control points, and soldiers running a long time to get somewhere, and think about it, how much fun would it be if you had run for like 5 minutes to get to a controlpoint at the other side of the town, to get killed almost on the moment you get there and to have to run that time again?
everybody would become medic! or sniper,so they won't have to run that long.