If I had a magic wand and attention of the game developers …
An "Exhausted" nerf applies after 50 game minutes of no sleep. The effects are reduction of physical damage by 50% and stamina reduction like health reduction when freezing.
A "Starving" nerf after 90 game minutes of no food. The effects are -100% health regeneration and 1 hp per minute.
A map should be crafted from from sticks and scraps and take up a slot and be sharable, more limited in size covered than default, and reveal only what a player did while the map was in possession. Maps could be added to the cartographer's table when built.
Ability to start stumps and trees on fire for coal. Would take a really long time to start a tree on fire, but would mean chance fire could spread. Base chance in Meadows than Black Forest and Plains (tree density will play important factor in spread). Very hard to start fires in Swamp and Mountain. Not sure about other biomes.
Source: https://www.reddit.com/r/valheim/comments/wg6og0/some_changes_i_would_make/
