@shaggiedo
If we go by just your 2 chest suggestions, although there be many more ideas out there for Chests, I'll break them 2 down.
Extracting water, how much is extracted, how often? A 2 man sloop would end up a 3 man in that case, as the 2 wouldn't have to worry about bucketing water, depending how quick water was extracted, also negates the need to repair.
Hardened hull, I see no point in this, I can't really give a constructive break down, just seems like a buff to PvP to make them (from people that want to run away playstyle perspective) stronger, more overpowered.
The tools are there already for PvE'ers to escape and tools for PvP'ers to hunt.
I'm welcome to more Chests, but ones for fun, even the ones that put you at a disadvantage, the Sorrow keeps you on your toes, that is fun/funny in itself, requires no PvP interaction for the PvE'er to be kept on their toes.
I've had 2 Sorrows on board a Sloop crying out of sync wondering when will I ever get a break from bucketing haha
If you haven't already, there's a thread(s) already with quite some good Chest ideas. Like one occasionally spawns skellies on your ship.
Please don't take any of my post as mean if it comes across that way, just my thoughts on how it may not work.