The KFF went back to 5+ for vehicles (we all knew that would happen), meks can opt to heal 1 hull point instead of weap destroyed or immob, the deff rolla has been errata'ed to work against vehicles, not just faq 'ed.
Can models on bikes get an extra attack for 2 hand weapons? Regardless of the answer bike characters got a significant boost against instant death from fists and meltas. Obliterators have true T5 again too! Nice.