It's too bad Age of Conan wasn't like this when it launched. While I'm only level 28, so I can't benefit from the improvements they've made in content, they fixed most of the main issues the game had when I first played.
One issue I had was that itemization was confusing. I couldn't tell what the stats did, they didn't seem to have a noticeable impact on my character, and there didn't seem to be a clear way of telling which items were "better". Also performance is tons better. These have been streamlined so it's a lot clearer how new items improve your character.
Performance and the graphics engine are better now as well. I remember there was tons of lag and memory leaks and slowdowns and weird graphical glitches when the game first came out. For example - when the game first came out, every item in my inventory always had a semi-transparent floating yellow "?" floating over it. It would disappear when I moused over the item (causing the normal spinning item display to appear). It was cosmetic but terribly annoying because I'd have to mouse over every item in my bag first just to get them to look normal before I could look for an item. I've seen nothing of the sort this time around.
On the other hand, I think my Tempest of Set has been "rebalanced." I don't remember things being this hard. But maybe I've been playing the target and auto attack style of MMO for too long. :)