Red51 has said before that particle generation blocks (smoke, steam, water, etc.) are planned.
I definitely agree about needing more textures, there's only so much you can do with recoloring, scaling texture size, etc. to make them look different. Hopefully when more regions / biomes finally get added we'll get a good bump in textures from the new materials. We still need translucent fabric panes as well.
I love the seasons in the game, but we really need separation for indoor and outdoor plants. a potted plant indoors shouldn't be turning with the seasons / getting snow on it, etc.
The big QOL change that needs to be made is we need the ability to scale everything in survival. There's no reason why we should have to switch to creative mode just to scale something. I'd also say that needs to extend to scaling blueprints as well, there should be an option to lock / unlock the x,y,z axis when scaling.
Dynamic fabrics, ropes, etc. would be amazing. I know it can be done in Unity and it would have so many different uses in Rising World.
Streams, waterfalls, etc. and the rest of the regions / biomes and the bio diversity really should be the priority before anything else though since that is the foundation for POIs, etc. and one of the last main mechanics that'll cause people to wait to start a new world.