You know, that was something that annoyed me as well. I had the mono-wire, and was surprised I wouldn't garrote or otherwise use it to kill them. Like, the Matis blades could use the Deus Ex style of murder; and the Gorilla arms you could just Darth Vader them by the neck and throw them against a wall or smash them into the floor.
Hopefully we can get some more fatalities in!