LostInSpace have said alot of good things, but somethings I dont liked.
One of them:
Multiplayer Search and Destroy - Search for a certain ped without the use of a Blip when you find them a mini boss fight appears and their health goes up to 6000% which you have to fight them until their knocked out. Similar to Lost Planet 2 missions.
@EDIT
Level system to upgrade things like: Strenght, Life, New moves, Defense, etc... Someone have said it?