I'm a pvp player from China and I've been played Insurgency for over 2000 hours,most of the time,I played the push mode and this mode is quite dominating in the server while the others are seldom played unless there're quite a few new players to vote for them.What's special about the mode is that intensity of the battlefield and the explosives which never stop due to the fast respawn wave.Because of that,a team(let me set the attackers for example)must pass and destroy its enemies defense as fast and they can,and make its attempt to conquer the objective before the next wave of enemies arrive,so time is the essence. In order to achieve the victory, experienced players (I mean those who want to win,not some stupid campers) use explosives or stab the enemies from their back to clear the path,and some pros who are accustomed to the map and the other players regular positions use pre-fire and their FPS skill to get direct frags,that's where the 'cod-like' comes from. It's quite a sense of achievement when you make great progress in the game and carry your team to the objective,commended by your teammates,so most of our Chinese PVP servers turn the killfeed on.
What's also worth mentioning is that it's easier to find a camper with killfeed ON by checking his name and weapon,so it can make the team slightly more active,which is good for the team,especially for those new players,to avoid them lying in a bunch of grass and snipe for all day,which is unlikely to lead the team to victory.(For example,a 11K/2D sniper is far less useful than a 14K/12D rifleman at least in push mode.)
Well,I believe that NWI might want to produce the game of their own style(realistic&cooperative),but in PVP mode,you have more than one life,instead of the only one you have on the real battlefield,so sacrificing yourself for your team is really OK.Even in competitive matches,there could be one-life-only mode in which players take theirs steps carefully and the regular push mode which is fast-paced and exciting.I really hope that NWI won't give up the fast-paced part and the game be filled with more experienced FPS lovers.