I seen a lot of shipwrecks and a lot of water but few boats or water creatures. None.
Boats - please add premade small boats like canoes, rafts or small sail boats that you can make also with the early raw tools and materials for use along steams, rivers and open water. Please have inventory space in the boat so we can put things in it. Please add fishing rod to make.
Shipyard station - please add a shipyard station where you can research and build bigger ships with pre fabricated pieces and styles. This could be a big hit and people can also build ships as home instead of bases.
Water Creatures - please add some water creatures, monsters , large fish, sharks, whales , dolphins , something!!! 
This would fun com. Be able to fish from boats , get animal resources, hunt, and upgrade boat fishing and harpoon gear.
Theres a lot of water let’s use it with more underwater and on-water activities.
Thrall Arena - please add marker where you can convert the area into a thrall arena. Pin your thralls against each other in 1v1 or put as many thralls as you want to fight each other in gladiator mayhem to see who is the ultimate winner.
If you read this, thank you for your attention. 