I want to preface this with the fact that A: I really love the game and it really has great potential & B: I only play on the PVE server as I hate PVP games....
1. OW sailing - not fun, because.. It takes hours to get anywhere and there is seldom anything to attack in between that isn't in a fleet.
2. Hunting for targets - not fun, because.. NPC's you are at war with don't attack you, nor do pirates. Other than via combat missions most ships cannot be attacked as they are in fleets so you can spend hours on end in OW with nothing to attack.
3. Quests - not fun, because.. There are only 2 quest types.
But again, I love the game and think you've done an excellent job.