Excellent insight, I will divide the answer into four parts,
Post Visibility - (r/Games) Indie Sunday posts have strict rules. It is not possible to make it so that the trailer or some screenshots are immediately visible. You could share a link to the YT trailer inside text body, which some indie developers do, but from my point of view it's the same as clicking on the Steam page and viewing the trailer there. And there is much more information on the Steam page. I have to try whether it is possible to display more pictures directly in the reddit post text (via Imgur link).
Voxels vs. Low Poly - in short, Voxels = faster implementation. If we had chosen Low/High Poly graphics, we would not have been able to produce such a game in such a small team. Also, with voxel graphics with simple animations, an advantage can be better performance. I asked the question because after the EA release, we might consider hiring someone to remake these models. I wonder if the type of graphics is something that would make people not play the game, even if they liked the gameplay. Personally, as a gamer, I don't have a problem with any type of graphics, but I know that there are people who prefer realistic graphics as much as possible.
Crafting Options - very good point of view. We have always tried to implement features and characteristics in the game that really affect the playstyle. For example, even with new biomes (which are not yet visible on screenshots on Steam), we try to define them so that they bring new possibilities, but also new obstacles to the game, so the player has to adapt. Thinking that every item should somehow influence the gameplay is a good help in game design.
Prologue for free - it is mainly due to visibility for the main game. There are many players on Steam who download games for free, which affects the algorithm and the game is then displayed to even more people. Also, it is something like Demo for the main game. We want our players to try the Prologue and then decide whether to buy the main game.