In my personal experience, 1st flush the transmission oil, 2nd check if the transmission has the software upgrade for the neutral diasble, 3rd check motor mounts, 4th check cv joints and other shafts issues ( sometimes is not a rough transmission engage but some loose movements on the shafts or motor torque movement while accelerating ). Up to here, repairs are not expensive. Then, expensive solenoide/valve body replacement and transmission replacement. Do not allow your workshop to begin with the expensive ones. On top, a new transmission or valve body with the other issues not checked and solved will destroy the new unit.