So the change to cloaking is already being discussed, but there are other changes, and not everyone looks in the rules section so...
(lets see if this topic get's ninja'd)
Major changes or clarifications are
Cloaking seriously nerfed to take place at the start of the turn, not before the ship moves
Accuracy corrector answered as taking place in the modify dice step
What it takes to no longer be "touching" is clarified
Damaged Sensor Array does stop upgrade cards without the action header from working if the ship has the action normally (Isaard on a firespray or ACD)
Autothrusters and turrets are clarified
IG-2000 and injured pilot clarified. The ability of the injured pilot goes away from all ships, but it may still use the other's abilities
Lots more minor clarifications, but those are the major questions answered.