game is way easier now(yea i know it was easy back then too.)
u can farm plenty of money just by doing heroics
u got new KOTFE story which is actually very fun, but sadly its another prelude to farming - but in the end its mmo right?
u get plenty of new companions, along with the ones u can get from cartel market packs like Akk dog, or droid probe etc.
more lightsaber crystals, including 3 coloured ones...
prices on some items at least on my server are higher than they used to, but i think its people trying to push the market too hard and on other servers its same old same old.
well there are new ops and world bosses, new planet like ziost with quite unusual dailys - though i like em
pvp balance is lame as it was, but still if u liked it - u will like it now as well.
and level sync which makes u unable to solo WB anymore, but u get good rewards from low lvl quests and heroics as they were your (65)lvl.
i suppose these are major ones in short version