Kurokazin

So with the incoming update, should I just go ahead and hold out fort he expansion before playing? I generally don't replay games(Dragon Age Origins was an exception), so will this 3.0 patch have a noticeable amount of content that would warrant holding off for? Also, I generally play on the hardest difficulty, would chanters still have the same impact on potd, and how does warrior/paladin's damage fair on potd with the raised stats compared to other more damage focused characters(rogue/cipher/ranger)?

So I decided to take a huge break and wait for white march to come out, now that it's out and the dust seems to have settled, I'm ready to start the adventure anew. What would you gentlemen say would be the current tiers of the classes? Are chanters still crap? Wizards/Druids still power houses? Warriors/Paladins still only good for being punched in the face? If any of these facts changed, what/how did they? Please, Teach me senpais.