This patch focuses on the second boss of the game called Northwind. Normal difficulty is supposed to provide a challenge while still being approachable for many players. The intent for the second act boss is that you might need to do the act 2 questline and get together at least a few blue items but I don't want players spending an insane amount of time grinding in act 2 in order to beat this boss.
If you feel like you were happy with the difficulty that was present before, there's hard mode and very hard mode waiting for you! But I also feel like he's still a decent challenge even after this update.
Let me know your thoughts after fighting Northwind.