I really dont care about deathmatch and I'll even be caring less about it when the full game comes out with hunt, and infestation. However I think deathmatch and team deathmatch for that matter would be loads more fun if your killstreak was more of the objective to win rather then just your kills.
First of all the way it is now is to see how fast you can rack up kills which gets very boring as most deathmatch games tend to do because of the same reason, but if the kill streak was more of the objective it would create alot more tactical sneaking around and being more careful of how you encounter your foe.
As an alien dark shadows would feel WAY more important then they do now and the walk mode would feel much more important aswell, as of right now you feel the need to sprint everywhere, and focus jump on people in order to pass up their score. Taking out lights would also feel alot more like something you'd have to do to stay alive rather then just a silly gimmick.
Like the alien, the predator would need similar techniques but would require more observing how he should handel the situation and staying invisible to the enemy until its to late. The developers in many vidoes talk so much about how the predator is more like the eagle watching, observering, while the two other races are clashing and then he jumps in for the kill. In here its never like that.
The marine however unlike the other two isnt very stealthy, but that doesnt make this system pointless for him, right now a marine can easily get away with dying aslong as he kills his targets fast enough, there is no fear for him to die. Marines with a system such as this would actually need to work more using the small corridors and rooms and an eye on there motion tracker, aswell as the lit areas of there flashlights, and sticking close to the available lights around the map.
I know alot of you would say this will definitly increase the potential camping, but isnt that what AvP is kind of about? But with more stealth involved in the game it could create some more believable tactics for engaging someone whoes camping. Making you think before spamming away at your attacks.