-It's great that we can use stone to make a lot of different blocks, but that's also what makes survival a bit tame. The game would need more ressources in order to make all those vastly different blocks of different materials, and/or different crafting stations to make the more intricate ones. It really feels like creative mode otherwise.
-Better land generation. It doesnt look too nice sometimes, not enough flat land. always weird hills and mounds.
-A real expansion on the combat mechanics and items. more weapons, more armors, and maybe even enchants and such. more hostile NPCs that drop good stuff. dont be afraid to go a little bit in the fantasy realm, minecraft did.
-a more focused art style would be a good idea. in general it's not such a good idea to add walking skeletons (fantasy) with the ability to easily make blocks of the modernist art style. it just creates something weird. in fact I think the modern style furniture and blocks should be for creative only, or at the very least it shouldnt be that easy to mingle rustic world with modern art style. i use minecraft as a reference again, but they dont have anything that could be considered modern looking, and I think this is part of its success. player must be immersed in the Rising World universe, and things that dont go well together breaks this immersion.
thats what i got for now. those are elements that should be expanded/worked upon asap, because for now I dont think building needs improvement which seems to be the main focus of the game. it's already better than 99%, maybe even 100% of the games, so work on something else for now in order to make this a more finished game.