ROCKET PROPELLED GAMING!
Just had to put that in there.
So, yeah. This mod is forking epic. You're right about winter, though. God-damn annoying. The moat around the villages' town hall is pretty useless when it's frozen over and you can walk on it :P
Really enjoying the stat bonuses, too. 2 hitting all basic mobs (I.E: Zombies and skeletons) with iron swords. The air ship is incredibly cool as well. No need to run everywhere or make minecarts when you just fly over everything
Edit: Nearly forgot to mention the elemental creepers! I found one that explodes in such a way that the ground they explode on gets covered in snow. There's also a weird one that has a dirt texture and a grass hat thing that places dirt blocks in its explosive radius upon... well, exploding.