Where should we start? Mana tide trainable for all Shamans? Fat chance. The Spirit Weapons buff (from 15% to 30% threat reduction) will be a big help on uncontrollable burst damage like Windfury procs. And not only does he share some of his character stats (sounds like his right below where I'm at), but he's got a list of concerns that are being passed on to the devs.
And my own pet issue, the various "Shields" that we've got, are due to get some love as well. Along with the 2.3
Shamans aren't a broken class-- I don't believe any class in the game is truly broken. I love my Shaman. But there are a lot of exciting days ahead for Shaman, I promise you.
* As Baluki points out in the comments below, Water Shield has other good stuff happening in 2.3, too-- not only does it give more mana, but at the end of a minute, it cashes out everything for you. Very nice.