1. Yes please.
2. Sure, I saw the dryads walking near the plants and I thought they were going to grow and get immobilized. It'd be cool to trick them into doing that as a possible puzzle. Or/and you could maybe do a block/plug puzzle with them when they've gotten too big. Like maybe you have to slide them next to some vines that will drink the milk and open a path for the player. I think it'd be neat to integrate some more puzzles like that to get some more playtime and depth.
3. I Liked em.
4. I also like those.