Guild Wars 2

Hey guys, I just decided to come back since season 2 is almost under the belt.
I stopped playing something around the ol’ dragon bash.
So what should I know? Any dramatic changes/additions besides the trait system?
Cheers!

As topic says – I abandoned gw2 on september cause of boredom and lack of time.
I felt like playing it again now (from the beginning) – I’ve read a bunch of patch notes but i’d like to know your opinion – what class to is worth starting with now?
I used mostly warrior/guard/necro earlier.
I’m mostly pve player but I really like to jump into wvw too, especially on top tier servers.

Are there any major changes/news I should hear about too?
Thanks in advance