I'm going to have to say that my patch 2.3 upgrade was pretty smooth.
I run Windows Vista, and there is a little hickup with the Blizzard downloader. You need to run it as administrator, so I never get a background download. To get upgrades, I have to start WoW as administrator, and I usually only do that on patch day, so I had a 281MB download facing me when I got home yesterday. A little shock when it started off telling me it'll be a 4 hour download, but it ended up taking less than 1 hour.
Curse.com seemed to be pretty responsive in the early evening, so I was able to get latest copies of all my plugins pretty easily. The curse downloader did most of the work. I don't know if they added more processing capacity since 2.2 came out, because I found Curse.com to be brutal that night.
I made the switch from TitanPanel to FuBar. Initial feel is pretty positive. I like the Ace2 concept where all the config screens are easy to find.
Gatherer addon didn't have any downloads available in the early evening, and it actually broke and gave LUA errors. Disabled it, to only mild discomfort. Then, wednesday morning, an update was available, so hopefully that'll get me back to efficient gathering.
In the end, I was back to an almost fully functional UI in short order, and then went in to grind and quest.
The first thing I noticed was the appearance of herbs. All the herbs I could pick (ok, so I only came across terocone and felweed, so "all" is a dramatic statement and an assumption) had this sparkly appearance or aura around them. Makes them a drop easier to spot. Eh. I kind of liked the challenge that sometimes presents itself when you're standing right on top of a herb location, and your "track herbs" is showing you there's something there, but you still cant find it. Just makes it feel like herbing is actually a skill, and not just point and click. I'll get used to it.
Quests on Mini-map
Then I saw these cute question marks on my mini-map. Very cool, so much easier to work with finding new quests and turning in completed ones. Big fan of this change.
Hunter Dead Zone
After writing up my thingie about the dead zone, I think it'll do better in its own post.
Pet moving behind mob
I'm not sure if I experienced this happening or not. I was only running solo, which means that my pet has aggro almost all the time, and so therefore should not be trying to move behind. I thought I did notice a drop more of the little subtle movements right at the beginning of fights that my pet and a target mob usually do. It just felt a drop more jittery right at the beginning. But, perhaps this was because I was fighting some Warp Stalkers, and they might just be jittery as they cloak/uncloak, warp/unwarp.
More to come on that as I get some instance action and group action going.
My guild setup a guild bank, and is demising the duckie banks we have. So I think that's cool. I didn't go look at it yet, but the guildies were chattering about it and seemed enthusiastic, so that's got potential.
Although I haven't seen it in action, I'm also a big fan of having tank repairs funded by the guild. Especially for tanks who spec such that farming becomes really tough for them. I want to make it as easy for those guys to fund repairs as they can. I'll have to wait until I see how it is implemented and administered, but my thoughts on the concept are pretty good.
w00t, 12 items attached to a single email. Outstanding. I mail so much stuff between Amava and her AH mule, its not funny. Saving me some clicks will add up over time.Video Settings
Tiny annoyance, but they set my video settings and action bars to default settings. Easy fix, just jacked all the video settings back up to maximum, and enabled the action bars which showed back up with all my stuff in the right spot. So this was easy.
I think that's about it for what I've been exposed to in the patch so far.