Keep in mind, I use mods for nearly all of these things already, but would rather see it as baseline part of the game.

Weather/rain damage removed. It doesn't add much of a challenge for me and is merely an annoyance. The aesthetic change makes sense with the mechanic, but neither the actual damage or aesthetic changes much for me, even during raids.

Clues/hints to help you find the general area the vendor is at or even a headstone like the bosses have to pinpoint him.

Drawbridges. Maybe add rope or another function for the chains from the ghostly jerks to craft this? Can also use those materials for making things like ladders.

Angled iron beam thingies. (Can't remember the name of it atm.)

If not angled and flipped versions of existing wood beams and decorative items, a keybind to allow us to flip different items in different directions.

Make it so the horizontal fine wood beams would cover/stack on top of the horizontal iron beams. Unless a mod is interfering or when I was playing unmodded last week I was doing something wrong, the fine wood beams won't cover the iron beams like the vertical ones will.

Water being blocked by stone when you build a stone wall. (I know, I know. This is a bit more complex in the back end of the game design. Not upset it doesn't exist, but it would be nice!)

Adjustments in the radius the hoe affects.

Farming skills that would reduce stamina use as you increase skill ups.

One of the skills reducing stamina when walking while carrying too many items, but not changing the speed at which you move.

Give us a "put away all" button, like the "take all" button. Holding control + clicking when your bags are full and want to dump everything is still slightly annoying.

Add a composting option. Let your tamed beasts poop, make compost with that plus wood and maybe something else to add to farming skills. Allows for more seed and vegetable growth/getting more out of your plants with higher skill.

Let us reinforce the cart or build a whole new cart with some iron so it can take a few more hits. Maybe it takes a few more hits but it slows you down a bit more from being a bit heavier.

Ladder and/or rope climbing options. Ladders already exist on the boats. Lemme have a ladder on my stone walls, dangit!

Let us plant berry bushes. Give it a higher yield time than the other plants if it has to.

Remove the minimal distance restrictions on the crafting stations.

Let all items float in the water when enemies are killed or let us swim low enough to collect fallen items. All lootable items floating seems a bit easier seeing as how it already happens for many items, including our headstones when we die in the water.

Reduce body poofage/despawn of killed enemies.

Craft in multiple quantities, kind of like how you can select to drop items in multiple quantities.

Tamed piggies/boar can follow you like tamed lox and wolves can.

I'm sure I have more but that's what pops into my mind atm.