This is a played out system that has been hacked to shreds in all but one cod game, and I know it is a matter of time before blops is hacked up also.
Reasons why it should go away.
1. It promotes hacking.
2. You kind of lose the great feeling that you hit top prestige when so many others did it in an hour or less.
3. This system is played out.
A new system lets say level 1 to 1000 would be sufficient. Have several unlocks along the way. Just something different please.
A simple xp/money system would be fine where you start out with basic perks, weapons, and other items, gain xp/money with game play and you purchase or unlock things as you go along. You could have a rating system that takes certain things that you do and ranks you from private on up to commander. Also unlock new symbols based on the amount of days you play the game, that way hackers can't just magicaly go from o to 10th prestige in no time.