The most important:
Splat XP has a Maximum of 1/player BUT all players gain the xp. So if the dawn ceded the scene, the twilight, eclipse and zenith hit their role bonus then all players get 4 splat xp.
Others:
A craft re-write
(usually) training times are ignored entirely
The lose a limb option is not 1/story. (We have had someone who had to lose 3 limbs to survive and it turned into a decent RP moment)...