Basically, to craft a high-end Rare (they are supposed to be the best items for some item slots) you'll need to salvage 58 Magic and 11 Rare or better items, all of which will be Inferno level stuff. That's 69 (insert childish sex joke here) item out of the economy just to have a really low chance to get an über item. You'll also need 171,054 Gold, which I bet will be a ****ton. Tome of Secrets (you'll need 17) is a random drop and its rarity isn't known, but I bet it won't be too plentiful.
I think we won't be running in über gear for while after release. These crafting costs still seem really high, even when I consider that millions of people will be playing the game.
The rarity of high-end Legendaries and Sets will most likely be comparable to finding the required materials to craft these Rares.
No, you misunderstood me. Azurewrath's 522 minimum DPS still includes all the damage bonuses it carries (each bonus have a range as well, that's why Azurewrath's DPS isn't fixed), but you can't see these at the moment. The 210 DPS for the crafted item is the base DPS, without any bonuses at all.