Droid Invasion: Droids are actually useful now O_o
Combat Revamp: Combat changed alot, no more defense stacking.
Geo cave: New cave with strong monsters, boss: ackley can drop uber items useful for making my 500dmg stun baton
Cor cave: New cave yet to be opened (or im too stupid to find)
Theme parks: MUUUUUCH better rewards, can reset your status in a themepark
Imp crackdown: Provides rebels with portable faction farms

I think alot more shit... cant think off top of my head. hope this helps u