I just finished the submarine tutorial 1.4 successfully (killed the frigate and escaped without being seen or damaged) and it gave me a -75 score with bizarre conclusions like me losing my submarine and the frigate not being destroyed.

Seems to be like an absurd amount of time and effort was wasted by the move to 3D. Time and effort that ended up missing for all the systems that actually make up the gameplay of the game. What a disappointment.