4 weeks before the first tea shipment, my boat was taken. All because only one port wanted any opium. And it was very little opium. I ended up with ~120 opium chests and a score of 24...
Even if you can't save, I'd like to have more freedom in repositioning tiles. I just came across a level where I see a way to rearrange tiles while keeping the limits satisfied, except I can't because I can only move 1 tile at a time, which means that I can't move what I want to because the individual moves don't fit the limits, even though the end result would.