I don't know what you did with U57 but holy **** did you bork gameplay. Lag, missing shots, spell effects not registering, have all been magnitudes worse since U57 launch. It was not the best before but after. it is stupidly bad.
And for love of god, can you finally fix Eye of the Titan. That warforged titan's path and AI has been screwed up for 10 years. Ran it twice, or tried to, and both times it bugged out when the Ancient Stormreaver Captain spawned and the titan was supposed to come down the stairs.
Every quest that you have NPC scripting that says they have to go here or do this a horrible rat filled cesspool of a quest. STOP MAKING THEM!