I'm loving the Freelancer mode!
The best thing about it in my opinion is the lack of ranking system and leaderboard. While the franchise has always offered lots of ways to complete your contracts, Silent Assassin(/Suit Only) has always been the preferred method. Freelancer on the other hand truly allows you to go outside the normal since you don't get (big) penalties for doing things you normally wouldn't. Someone sees you do something fishy? No problem, shoot them and carry on with your mission.