Are you using the assist options for cyclic and tail rotor?
As Jorg and Seb said in a recent interview, the intent from Asobo is to make helicopter behavior realistic, and then use the assist options to make them easier to fly with certain controllers or for beginners.
Personally I hope that developers don’t make helicopters unrealistically stable. I would be surprised if a real Cabri G2 would really be as stable as the one in the sim, but unfortunately I have not the opportunity to test that out …