I still think Herald Volazj is interesting. It´s not that hard to get value out of that card for priest. It´s going to be interesting what the priest commons/rares are going to be.
Priest so far is pretty disappointing--reminiscent of TGT where we got these kind of off-the-wall cards that didn't really seem to do much (excluding Holy Champion, Flash Heal, Paletress, and Agent.)
Shaman has gotten some really great cards and I expect it to take off come Standard. The only thing it seems to be missing is a control variant, but with the fall of Paladin (one of Shamans toughest match-ups), I expect them to only become more popular.
The two new Rogue cards look like a lot of fun. I especially like the legendary. I really hope the other cards are just as good.
The biggest problem I have with standard is standard itself. Dr. Boom was my first crafted legend. I didn't really even want him, but saw him as a necessary evil that would strengthen a number of my decks. In retrospect, if I'd known about standard, I would have craft Ysera instead.
It seems that there is very little incentive for non-tournament players to craft legendaries (and maybe even epics?) from non-expert sets since they'll rotate out. I really wanted Paletress, but what's the point if she's just going to be gone in another year? 1600 dust is a major investment, especially if you're not spending much on this game. Now, I'm better off just crafting Rags, Thalnos, and the gang since they'll always be around.
If they increased the dust value of non-standard cards, that would help. Instead, I feel like they're just going to focus on making epics and legendaries "must-haves" so that you're forced to craft them (at an accelerated pace since sets rotate in and out now) or spend more money to buy them. That 800 dust I spent on two lightbombs is gone (though to be fair, I've gotten my use out of them. lol) All those people who spent the dust to craft a golden Blecher or Pilotted Shreader...man, I'd feel bad for them. Makes me glad I didn't craft some golden Entombs.