It's kinda hard for me to put into words how Patch 3.3 has affected me - I don't PuG very much, my adventurers are not yet sufficiently geared for Icecrown instances, and the changes to the UI, although very useful, are merely cosmetic IMO. I can do without the flashing words telling me I'm entering/leaving combat, what buffs/debuffs I'm having and when it's faded and the amount of damage/healing I'm getting... although to a new player, this may all be informative information that he/she might want to know.
I've taken a little time to detach Aenur to Dalaran to take up the cookie trail quest to ICC - you know, the one that points you to the Forge of Souls to meet Dark Lady Sylvanas - and I toured the place a bit. The looks are cool and stuff, but I've not gotten the urge to whip up a group (never did =P ) and thrash the place. On the other hand, Grey, Krae and Dharr apparently has run the place over and over and they've managed to snag their own Quel'Delar in the process (lucky b*stards... I envy them =D ).
Honestly, the change that I'm very much liking is the reputation tweaks. Aerhandor have started again on the Ebon Blade - he's halfway through Revered now - and getting 325 rep per daily instead of the 250 rep is very helpful. The original schedule estimates that it would take him 5 days to get to Exalted, but with the new estimate it would shave a day off. That means I can move him to Tourney dailies slightly faster, and would make Aenur's attempt at Exalted with the Wyrmrest Accord and Sons of Hodir more bearable.
I'll leave my opinion on the patch on 'Pause' right now, since I have an entire weekend coming up where I can finally test the ICC instances and maybe try the Dungeon Finder feature.