In a recent tweet, Alan Kertz (@Demize99) revealed that players cannot be revived after a knife takedown in Battlefield 4.
@EricFriedman2 @BSHU55 No revive after knife.
— Alan Kertz (@Demize99) September 8, 2013
This should add an interesting new dynamic to Battlefield, providing a bit of a tactical advantage to the knife takedown that goes beyond simply collecting tags. Players looking to stealthily move behind enemy lines can not only take out their enemies quietly with a knife, they are also have the advantage of they player they took out not having a revive icon over them alerting other enemies of their presence. Of course, they still have VOIP with their squad...
One concern that arises from this, however, is that this could be a level of incentive to risk too much in getting that knife kill. Depending on how sound works in BF4, that enemy may hear your not-so-ninja footsteps as you rush from behind with your knife, completely turning the tables on an easy kill.
A question brought up in the reddit discussion of this news is whether or not knife kills will count toward the kill streak for the commander's High Value Target ability. Many are concerned about how easily an otherwise successful stealthy flank could be ruined by the Commander lighting you up like a Christmas tree.
The original tweet that resulted in this news also inquired whether headshots would be unrevivable as well. The fact that Demize responded only regarding knives, and then later stated that it (assuming the unrevivable status) was "specific to the knife", leads me to believe headshots will still be revivable. Though many have requested otherwise, this makes sense to me, as it gives the knife takedown a unique tactical element. Also, the knife takedown is a very intentional action, while many headshots are simply the luck of uncontrolled recoil, and therefore relatively common and very random. I am not saying it is a bad idea; we would only know for sure if we tried it. I am speculating, however, that it would make the revive function seem far less significant and defib paddles may become as common as ammo bags in BF3.
I look forward to seeing how this and other game play changes impact the meta game of Battlefield 4. I certainly appreciate that DICE puts thought and effort into finding ways to tweak Battlefield and give us these new tactical elements to consider. Battlefield 4 is certainly shaping up as something that will offer a different style of game play that will hopefully make coordinated team play fun and rewarding.