[@ProPro] Crew positions will be decided on by the players. Aside from the captain and first mate, I don't mind positions to overlap. The lack of utility would be something I could exploit given certain situations.

Decisions on where to go would be decided by the crew. And even if you decide on where to go, what you do on the island wouldn't necessarily be the same, right? Well, unless everyone just wants to stick together. Hence the "semi-sandbox" aspect.