Either way timed exclusives are still remotely unfair to the other party because they are able to see the content within the game that they will have access to at a later date. Any timed exclusive material is either hurtful to that region of the game, Certain areas of a map or in this case a strike and weapons, or makes it that more desirable but not much more enjoyable because you already know where to expect certain items in that area of the game. It is damaging to that certain area to have them in any game or have practice them in the first place, even with CoD and Skyrim.