More player customization, and maybe the beta parts back with better details and less lego based
A lot improvements on Shadows and Shaders to be less power consuming and easier to be handled by older computers and Intels
Bloom effect
More Paint FX options
Interactive bricks
Better physics with vehicles and bricks
more player animations (such as walk when pressing C and swim)
ambient sounds
more environment options (movement of the clouds, wind, stuff like that)
Complete tutorial map just like how it used to be with interiors and terrains
Anti-Aliasing options on the game itself, counting the shadows too
Baked shadows
Waves for the water on the environment options, with the ability to increase the height of it
Earthquakes (with toggeable delays and bricks fake killing)
Reflection, it could be a Paint FX option