No idea how many of these have been suggested or something similar before, but here's a list of things i think it would be cool to see tweaked/added.
jump skill reduces fall damage or maybe roll at bottom of jump to regen some hps
bees buff crop growth, or a later hive that does this
cart lets you repair or a later cart that lets you do this
run speed on roads increased
freelook(probably alt), or at least a way to glance behind you without having to be autorunning
an owl/raven stand to send back a few items to base
a little cosmetic perch for ravens to come hangout
grappling hooks/ropes in general for scaling
chance for golems to drop a silver or two
ladder like boats, but for docks
leech ward for swamp bases
bone fragment uses. Maybe bone arrows or bone armor etc
glider
hoe/cultivator/axe multitool
shroom chamber made from crystal, fueled by flour
bow melee finisher
face paints for helm slot
wraith cloak for stealth bonus
shields block arrows when they're on your back?(this doesn't already happen right?)
colors for food buff times so i can see at a glance what i need. Maybe yellow at half duration and red at <20%
subtle grey outline for my stam so i can see my max when im in the dark
higher level benches can make low level items cheaper
workbenches pull items from certain chests, instead of needing mats in your inventory
belt/armor that reduces time between stam regen, or that reduces cost of dodging
vines to grow off base
/challenge brutes to duel them 1v1
Source: https://www.reddit.com/r/valheim/comments/qq3y7r/random_suggestions/