I know how you all hate topics about V21 but its a massive update and there are several different things each topic can cover. This is more of a suggestion for Badspot and add-on makers.
Are there going to be clouds in sky that will cast shadows if they are in line with the sun?
Will there be better rain and snow? (Rain that doesnt fall though bricks, its done before on AoG)
(Another question I am wondering is that wether the sun will be the only light source that will cast light. or will other lights such as "Player's Light" create shadows as well?)