1. There isn't much grass in the plains and in the old console edition was much more grass in the plains and was more natural in the old one.
2. Animation of the mobs death is not as perfect as the console edition
3. The ghast charge sounds are played several times.
4. If you disconnect from a server and switch to single player mode then you can't craft.
5. Zombies do not perceive villagers through the wall so they do not attack the villages.
6. Some servers do not have the perfect sound for certain things. eg eat on lifeboat server.
7. The enderman don't make angry sounds.

I hope you can fix them. Sorry for bad the English. I use google translate.