My list of suggestions

[C Dog]

It might take some time to lay them out one by one and code them all, but I think it would be worth it in the end for the developers. They aren't incredibly difficult things to code, I know that their current engine does support the ship customization along with guild island customization. The weapon and boat customizations may be tricky though, they would have to completely re-make the boats and weapons I think.
The guild ideas are pretty easy to make as well.
And yes, I could do it, I'm not suggesting anything I know that I wouldn't be able to do, I've had my fair share programming stuff such as this, and I know it's not easy, but it shouldn't take more than a two-three or so to develop each thing.