Returning player here, I do not know whether that was said already or not, but I think walking speed, flight and jump need to be tweaked a bit. Maxed out flight is faster than Signy's wheelie. Jump, I am not sure why it exists since there is flight, but if the jump was consequent it would probably be a lot of fun just to propel my character around and it could realistically be a pseudo-dodging mechanic. Walking speed is very sluggish, even at max.
I really love the new biomes and the way they make the game feel more desolate and alien. I don't know which update introduced them, but they're a great addition. No more of that drab mossy cobblestone floor. :D