I've got some thoughts I'd like to share regarding exploration and how to improve it, in an area that specifically needs it: Underwater.
I am loving AVWW so far, but underwater exploration feels like more of a chore than fun because of a major, MAJOR annoyance: You have no platforms/crates that will stay where they are in water! This means any time you go underwater, you have to place new platforms/crates that will eventually float to the surface, and become wasted. This results in underwater exploration being an incredible waste of resources to the point it seems impractical, since early on if you don't have a massive crate/platform stockpile, lo and behold, you'll likely run out underwater and be forced to suicide as you have no way back up!
So, what can be done? In my opinion, the following two items could make underwater adventures a lot more feasible, and a lot less frustrating. They could also be useful for other purposes:
Nearly identical to a Wooden Platform, except it has a considerably higher health value than a Wooden Platform, making it less suspect to destruction by enemies (Or your own attacks). In addition, because they're made of metal, they do not float in water and are ideal for making underwater jumping paths.
See the above, except these are crates made of metal that can take more punishment than normal crates. Also, they sink in water instead of floating, making them ideal for creating underwater stairways.