A wedding/couple system.
The partners could have slight bonuses together, specific skills unlocked with some kind of “love level”, the ability to warp to one another.
The wedding could give these feature to prevent abuse for TP.
The base feature would be a simple couple, and to take it further one could get a wedding ring to unlock the warping or some more special skills. Power of love and stuff, do not underestimate!
Being able to have your own house would be great, be it in Klai, Orsha, Fedi… They could be something to sell so players can buy or sell them for a price (more silver sinks are welcome), but to keep it casual the price would have a limit.
They would need to be actually useful, with some kind of unique feature in it like @game8bravo suggested, you could have your own oven, kitchen, an auction market access, storage (a chest or closet in your own house wouldn’t be out of the context).
I would also enjoy a specific house pet, like a cat or some other popular field monster that people would like to tame.
We could also have some kind of “rest bonus”, making it so that when you disconnect for more than some hours in the house (mostly when you go to sleep irl), when you log back, you get a “well rested” buff that gives you an additional exp, loot chance or various other bonuses for maybe an hour.
Being able to change a costume’s color would be neat, many of them are already really good looking but sometimes you just lack that headgear whose colors go finely with it.
Fishing system update.
Allow us to fish everywhere in the map with different spots of water, each map having its unique species, allowing you to cook them for different bonuses or even drop other kind of useful high-level recipe materials.
Miner, cook/baker, forger, agricultor, lumberjack… So many things that could allow people to get a modest amount of money by making these items usable in various consumables and gear recipes.
Add more towns. The world is big, yet everyone stays in KlaipedaOrsha is bigger, has a lot of accessible space, same for Fedimian, each town should be accessible depending on level with each one of them having their own special feature.
I would also really welcome some kind of bar or tavern like the one we see in the character creation, with seats and drinks.
Improve collection bonuses.
Having to sacrifice 0.30% headgears, 0.09% items or precious recipe materials to get +2 evasion or +2 magical attack is not very satisfying.
I know I already suggested this, but make dungeons only 1 run a day but make it so that they give 3 times more exp (the end is the same, just more time saved), it would make dungeons, especially lower level ones, a lot more useful, because spending 1h30 in a dun 180 to get 5 levels, it’s really meh.
Multiply tokens would increase the exp obtained.
BUT MOST OF ALL : Change the non-token user restriction.
Remove the time it takes to learn attributes, the 1 item market listing to 5, cut down the tax by 15% (selling a hard earned practonium as a casual player without a token and losing 30% of the selling from it feels bad), get rid of items becoming untradable that does nothing but ruin player’s live for no impact on botting and RMTing.