I'm not through with that book yet so I can't give you a definite answer.
What I've seen so far:
Races are structured better, as the traits that all mebers share are listed first, followed by everyhing where the races deviate, you won't read "+2 dex, -2 con" 4 times in the elves section
There is now a system for bartering, as items are assigned a value (in vp - value points). I haven't read that in any detail, but if I get it right, one vp is food for one day for one person. Values aren't fixed, as scarcity will make items more valuable.
Legates are no longer in the players' chapter, being a NPC class now.
edit: Oh, I've read the teaser material (the 32 or so pages at the beginning of the book which are all full-colour and another paper type) and races, and I'm reading heroic paths now.