I have already done last stand in its own post. With juggernaut people always get mad but it is realistic for some to take more damage than others. The only thing is that in order to take more damage you must add heavier armor which slows your movement. Bomb squad force you to pull out a detecter because someone is not going to know there is a bomb on the other side of a wall without seeing it or using some technology. When using stopping power it would be like choosing a specialty bullet so maybe there could be a choice with that perk to pick different rounds; for instance, armor piercing (maybe some rubber riot bullets to keep them down for a knife when you want a challenge). Sleight of hand is already realistic in that the player chooses to just be trained better with the gun. I am not sure about UAV jammer. I am not knowledgeable about this technology so I cannot tell if the perk needs to be changed. Eavesdrop could be done but maybe not as it is in COD 4. Sometimes you can here them talking when your outside the building and their inside on the other side. The rest of the perks are in pretty good shape.