Now I have been doing mostly pvp in 1.9 but I have played a decent amount of survival fighting mobs. I'll try to include shields in this as not adding them would be strang if slaughter were to go full 1.9. With that I'm going to just jump right into this. Skeletons:Skletons are a lot more annoying in MC 1.9 as they strafe a lot and would become harder. This wouldn't be too unwelcome of a change as they are kind of a joke at the moment. Also with shields skeleton's arrowws would be useless.Creepers:With shields a creeper explosion does 0 damage meaning creepers could be easily dealt with.Swipe Attack:The new swipe attack will allow players to attack multiple mobs at a time which will be useful for chickens especially and preventing the player from being overrun.Cooldown:The cooldown might make some players to become overrun as they do not know how to perfectly time attacksAxes:Axes will actually be worth it with their high damage.Armor:diamond armor will be more worth it as it reduces damage around twice as much as iron. Other armors have been nerfed and will cause the player to take more damage.Offhanding:Potions and bows will be able to be offhanded and used with a sword/axeHunger:With current hunger system giving constant saturation regen would become op and this would have to be reworked.A couple suggestions: ShieldsHunger (for hunger management and rapid regeneratioLingering PotionsIf I missed anything please leave a reply.