Devs
Tutorial needs some help detailing the map and how it works and understand it.
It may seem odd, but many players do not understand your "ship rate" islands and shallow waters ...
Teaching that early to players is very important.
Likewise,
Warnings out the waazoo about PVP/Black flag/Military flag... pushing the simple fact that no matter what rate you are, higher ships are going to come after you when in open water. Because there are players that simply plan to grief. Avoid the black flag, if you are not mentally ready for the fact that combat will come for you.
Or ... expand the 6th rate areas a little as well, giving more room for new players. This might not be needed, but is a thought.
There may be other suggestions, but these topics up in general chat so very often.