Some small, minor things found in the generator:

• Some jungle trees dont have wood and have floating cocoa bean pods.
• Some water on beaches that is right next to a cave/hole isn't updated (no flowing water)
• The new biome system is unbalanced. I can't seem to stop finding Extreme Hills, Deserts, etc. And some biomes stick together too often, like deserts and savannahs. It's like they are never ending.
• Some biomes are too rare. I've searched over 6000 blocks with my friends, and we have only found 1 birch forest, 1 heavy forest (one with the heavy canopys), lots of savannahs, plains, deserts, extreme hills (a lot), 1 tiaga biome (it was without snow too), no Mesa, no Redwood Forests, no stone hills, etc.