1. COD currency (from Blops 1) is gone
2. There is no "damage/range" type proficiency that makes a gun more usable at higher weapon xp levels (like Mw3)
3. There are more unlocks than levels, Vonderhaar has said that it will take multiple prestiges to unlock certain items (i.e. certain items are only available after certain prestige levels)
All this means to me is, there is no detraction from hitting the button, and I'll be going to the end yet again
what about you?