A little boost..
This DLC gives a little boost to the early part of the game. It's not necessary for the full experience, and to some people may feel this is like cheating. However, the coins, lockpicks, gear items and upgrades can reduce the grind needed to get these items and full upgrades for late-game. Plus, I'm not quite a fan of repeated grinding anywhere. Still, its lame to have to pay real money for this..