I think that Breath of the wild is a revolutionary type of game Nintendo made successfully as an open world RPG. I know that you might be thinking that it’s a completely different game because it follows a story and it’s unrealistic, but there are many more things that BOTW have that Survival games don’t have. I do watch streamers play it btw instead of playing the game.
Some thing that I think Unturned 4.0 should have from BOTW are the way to tame horses, beneficial and craft-able goods from a steaming wok or pot, Throwing back weapons to enemies, boomerangs that requires skill to handle and the ability for you and the opponent to throw a weapon at each other in case the weapon is damaged or it’s a boomerang.
I don’t know if it can work on first person, but I hope it will work fine. This just an idea by the way besides taking inspiration from DayZ-based games.
Expanded cooking mechanics are a given with the whole survival-centric push, and animal husbandry has been discussed frequently (it also used to be in the 4.0 Trello).
I’m kinda ehh on the whole idea of boomerangs, but throwable weapons is also something we need.
Whatever you suggest to take an inspiration from is (most likely) already considered. Advanced crafting (Cooking), expanded animal interaction and throwable weapons (In general).
Not sure about boomerangs. While it is historically lethal with a unique attack pattern and would be easily craftable, it depends if the dev wants to add it.