First, let me explain ALL the bad things.
1. Zombies have Strength 2, and will not burn in daylight.
2. Skeletons have Speed 1 and will not burn in daylight
3. Your probably are going to hate me for this but... Creepers have Speed 3. LOL!
4. Slimes can now swim, using Jump Boost 6, but they don't jump higher.
5. Enderman have Speed 1
6. Silverfish have 20 Health, so be careful!
7. Sheep have Speed 4. Why? SO GETTING BEDS IS x10 HARDER!!!
8. Spiders have Jump Boost 3, Cave Spiders +1
And that's all there is! Oh, and you don't gain health. So the only way is with any healing item. (Golden Apples, Enchanted Golden Apples, etc., etc....)
UHC v0.1 Alpha: https://www.mediafire.com/?voxzdu39fbsatxh