At first , was thinking that there was many issues and bugs with those planes but now i can tell you there is no problems with these. the problem was i didnt know how to fly it. Forgot the FMS in the MFD and adjusting VS and speeds.
The only issue i found is the YAW DAMPER in the caravan stuck on OFF impossible to put it ON when we clic on the button.
i just made 10 flights for both planes and everytime i land sucessfully.
i worked hard to understand it because there is not too many tutorial regarding those planes, so i am very happy to tell you so.
so the answer is TRY,TRY, TRY, and TES.T. so funnnnn