I personally prefer a slightly higher time to kill. Much like the original Halo trilogy. It made grenades all the more important. But unfortunately, the maps Bungie has created have too many obstructions to allow too much of an increase in ttk. Theyd just run or shadestep behind cover. No one would die except when focus fired by a team, specialed, supered, grenaded, or grenaded+fired upon. Actually...it doesn't sound so bad...