It's a pitty this drm issue. the game looks promising.
If the devs speak it right then sh5 will have:
- Better flooding of the ships.
- Multiple parts of the ships can break.
- Adds to the interior and crew managment a lot (the first person view,
press in sh3 shift-f2 and try to walk around and you can see how nice this feature is).
- Graphics of course.
- Much better campaign.
- Wolfpacks.