I have to agree with you that the damage done to mnta by ampha entrance and the judicial set back has been very heavy.
I do believe that given the fulness of time mnta will win their case against ampha. However like you say, the monetary damage mnta can recover from ampha/wpi may indeed be a pittance compared to the 3 or 4 golden quarters they enjoyed before the roof caved in, had that golden episode been allowed to continue.