Each race entry includes some "specials" for the race, such as unique items, equipment, magic items, spells, or feats, 99% of which is brand new stuff. We didn't add new planetouched varieties, but there are a heap of feats that build on planetouched abilities and improve them (an aasimar who gets to ramp up his light spell-like ability into searing light , for instance).
Actually, one of the things that I think is pretty cool about Races of Faerun is the long section on humans. We've never really delved into the various human ethnicities, their histories, where they are and what they're like, and this book includes a lot of never-before-seen information on the topic.
Regarding the bladesinger, yes, it's the errata version from Tome & Blood.
Is it worth picking up? The most I can do is say, Pick it up off the shelf at your local hobby store, browse the book a bit, and decide if it's right for your game. The book will sell itself, or it won't. If browsing the book leaves you flat, then I won't convince you to buy a book that you don't really want.