A ton of good updates mate, I bought it when it was released you see, got to level 80, peaked in everything was monsterously good at PvP and what not.
(life story, sorry)
Anyways, if you haven't played in a while.
Alot is going to have changed, i had trouble adapting to it, as i just started playing again two-three weeks ago.
Tons of has changed, It's more user friendly i suppose you could say.
If you haven't played in ages, expect like 6GB or so update.