4.2: The good and the bad so far

The Good:
Hunter
-Assist and Defensive stances for pets. Assist makes your pet attack whoever you are attacking, and Defensive makes your pet attack whoever is attacking you or your pet. Very useful and much more easier to manage.
-CC does not pull. No more waiting around, you and the mage both shuffling forward like you're about to CC. :D
Druid
-Not sure yet how the new Mastery will play out, but after hitting the 2005 haste breakpoint, Mastery is your number one priority. I'm assuming that means its pretty nice.
-All healing crits affect have been increased by 200%. WTF. Where did that come from. 75k heals from a paladin O.o Kthxbai
Other 
-Being able to move characters on your list. I love that Covington is now numero uno. Thank you!
-Reading mail does the /map animation. Awww the little details.
-Molton Front Dailies: Yay!...That is all.

The Bad
Thrall, Aggra, and that stupid Questline
I'm sorry. I am not a fan of Thrall anymore. I'm very heavily Team Garrosh, namely because I'm realizing how cliche'd and convenient Thrall's life is. Aggra is very annoying. She comes out of nowhere and is now Thrall's lifemate. O..k....
The animation and cutscenes were impressive. I give them that. And Thrall's new model is super duper shiny. Almost too shiny. Talk about making everyone else look outdated. But hey, I guess he's special. Honestly, I preferred his old model simply because he was an Orc, just like Malfurion is a nelf. I always thought the two were similar, just one for each faction/class, but I suppose I was wrong. Thrall should stand up right. Yah!
Also, all his animations are WAYYYYYYYYYYYYY melodramatic. I kinda talk that way all the time, so I should know...
Aggra's voice went from really annoying orc grunt ish, to husky womanly. Nice touch there.I always thought she had a strange man steroids voice when I would fly down to the Maelstrom. But hey, she talks a lot, probably not a bad idea to make the voice not so horrible sounding. She is Thrall's wifey now.
The questline was okay. Lore wise, its interesting. But the actual tasks are mundane and the same in each plane. Somehow I also kept getting flagged and kept dying from stupid Allies so I'm not sure.
By the time I was in the Firelands doing the last part of Thrall's spirit or whatever, protecting Aggra's totems (apparently she's not the only one whose doing steroids) I was pretty much over it. I only did it on my hunter because the epic cloak rewarded at the end was a decent upgrade, but the thought of running on other toons just makes my sanity ache.
Oh hai Nozdormu
He's been missing for two expansions, but Nozdormu just suddenly APPEARS, given a new model and standing around during Thrall's wedding/super plan. Yeah...fuck this shit...
That's all for now. We'll see as time goes on. I was able to buy a ton of old VP gear to gather into a haste set and grab that 2005 breakpoint. I'll see how healing goes now. :)
In general though, this Patch's release has gone VERY smoothly. No long maintenance times or blowing up servers. Nice job Blizz.