Minecraft wiki entry for Development_versions, associated text: Entities with bounding boxes smaller than 0.9 block (such as rabbits and bats, for example) now have them inflated to that value.
Increased base reach from 2.5 to 3 blocks, and removed bonus reach for delayed attacks.
Missing an attack now only puts a 4 tick delay until the next attack, regardless of weapon.
Removed "Coyote Time", which was introduced in the previous combat test.