I got in on patch day for like 30 mins.
I got on last night, all night, no bumps. Super laggy due to like 42 times the usual number of people playing. I played with 4 people that had not played since beta and everyone was lagging.
Love the changes! So much better.
I already had enough favor to unlock the drow (score one point for hating to grind the same quests over and over) and am working on getting a portable hole for my archer (already got the extra inventory tab). I really like that you have to work to get the module perks, they're not free. They also seemed to organize the patrons with logical order, so you get necessary things earlier, and more luxury perks later (cheap +3 arrows, thank you!)
The social panel is SO much better! I can find people, see where they are, and it takes down the LFM when the group gets full. I like a big list I can sort, but having it pre-sorted and broken up is nice too. I also like that guild names are displayed above avatars, and the color coding for PCs/partymates.
Some of the new weapon appearances are great, katana-like swords, hammer-ish maces, everything that I noticed looked sharp.
And the in-game mail system is a definite improvement, I just wanted mail, but they gave us FedEx! Hello easy alternate character equipment/gp transfer.
Keep it coming.