The story I personally find something beginning langsweilig. It was not until the late middle there is exciting.
Good is that some historical events have been eingeflechtet in the story.
The new setting in the winter, thanks to beautiful weather effects quite nice but unfortunately this also some "gray". The Caribbean flair with sun and beach I found anyway much better.
From the games mechanics ago Rogue was slightly expanded. Additional elements have been integrated in comparison to Black Flag:
for example, you can now even be boarded, there are more different side quests, etc.
All the little things but even increase in the total number of variety compared to Black Flag striking.
Unfortunately, the game lacks but on the whole the really big aha-if you have already played Black Flag.
The difficulty seems to me somewhat higher than Black Flag. Some hideouts of items are quite twisty and sometimes it takes a while to right (climbing) to find way. There are also more secret passages and caves.
The AI, however, is still the same stupid. One can, for example, still frantically shoot through the area, yet there remain many opponents unaffected.
Conclusion:
Players who have not played Black Flag will be sure excited and should resort to the same AC Rogue!
Those who already know can against Black Flag quietly wait a little longer until the game is a little cheaper.
AC Rogue is definitely good though but now again not so much better than Black Flag that it could stand out clearly from it!