Having played NP2 in real and turn based and this I feel i can say that this suffers the most from slow play.
NP2 works in turn based with only a few turns a day. However i feel this game needs more speed. Our group has played a 6 player map and a 2 player one. The 2 player one buzzed along and was at turn 35 within 2 days, whilst the other languished at 6 turns. NP2 is slow because almost immediately its diplomacy time and that takes a while which is cool.
If i may, a couple of suggestions to help this would be:
Email when turnover like NP2. People have been mentioning they don't know when to come back and don't want to be checking all day. We do use whatsapp but an email would help.
Some 4 player maps? This would be fantastic and reduce the chances of one guy being away for the day.
Its taking a little bit of time to get to grips with the game, particularly the buccaneers, but i`m really enjoying it!