Well if there are enough kinetic block types, and perhaps some simple switches, I could spend hours making more courses along the lines of Spitter’s Maw;
I’d still like more than that though. If I had a magic wand that’d give me any feature I wanted, I’d have harsh environments, and a practical need to construct shelters from monsters, weather conditions, and other environmental hazards.
Logic gates a-la Redstone would also be very nice, and add endless longevity to the game.