The last 3 years games have shifted towards the casual gamer, the only way you will have a "tactful" game "is' to play against other clans who play the same. But even then you still have those clans that will do what ever it takes to win and figure out glitches, cheats and other bullshit to get that win.
I see no place in these shooting games for killstreaks and shit like that especially perks, all that shit needs to take out of games period. The best way for games to incorporate shit like air strikes, air support and what not is to only allow certain ranked players in a game to do it. Only Officers should be able to call them in and only the Leader should be able to assign officers to his Clan.
If a system like what I mentioned was put in games you would have more people actually playing as a team than what you have now. It would also keep players interested in staying with their current clan. Imagine this, if you left a clan you would lose your rank and if you join another clan you had to start all over.
In America's Army for the regular XBOX there was a system similar to this. It is the only way a game should be played, especially when there are clans involved.