After i played the first contracts on "insane" which was pretty challenging but fun, i installed the patches because the new contracts didnt got unlocked. After that the game was kind of boring, u get much more money and the mission a easy asf.
As i read here, many complaint about the difficulty is to high, so i recommend to implement a option to change it ingame because i think is was perfect as it was and id like the new contract to be more not less challenging then the old ones, as its supposed to be in every game