Killcams are better suited for fast-paced arcade shooters (Quake, UT, etc.), where nobody is even supposed to stay put or "defend" anything. In a game trying to recreate even a slightly believable battlefield, "camping" and ambushing should be rewarded, not punished. Funnily enough, even in vanilla BF2 you look at the sky instead of getting an OOBE of your corpse and the killer!
You could still warn your buddies based on the kill message, but you couldn't tell them "sniper in church staircase window" or "tiger behind the second bush to the east of bunker" like you can now.