The only problem with VS in a descent (not qualified on 76 but other similar aircraft) is that without adequate monitoring of the collective and what power you have set, the AP can reduce speed sufficiently to put you into VRS. That is if you are in 3-axis mode.
Very true
crab, hence why procedures have to be tailored to your operation. In 12,000 hours on the 76 never once used the GA function, we were a VMC operation (cough, cough), never once flew an IMC approach in anger.