I didn't care to go through all of this but something I wonder if anyone's considered... They're running this on lower settings most likely, maybe even a laptop. It's very well possible the grass here is just a low-res textured version. They're very well aware one of the selling points of this game is the graphics, why would they deliver such a thing like this without considering that first? Seeing as these are just supposed to be "screenshots" of the game's current phase and to show off what they've worked on so far I'm doubtful they'd intend to leave it like that.