Multiplayer is surprisingly enjoyable. If they put as much continuing effort into it as they did with ME3 it could be good for a few months. I know EA won't want to hear this, but its basically completely pointless to buy chests with real money. The best items drop in game and I was able to unlock all the classes with materials to spare after a couple days of play.
Dagger users and the Qunari class seem to be the weak ones, but everything is playable, at least until you play on Perilous. Reavers, Archers, Elementalists, and Necromancers are the best options at that point, because shit hits so hard that chain CC is your only viable option. If you are anything that tanks, forget about Perilous until you slot a bunch of heal on kill (or just +heal for reavers and Necromancers). Walking Bomb, Blizzard, and Mana/Heal on kill really clears shit out on Perilous, with the Necromancer. My other characters just cannot compete, even though my Necro has a shit weapon. Any class can work at Threatening, though. Except maybe the Qunari class, since it cannot generate enough guard to stay alive.