Barter does change the price of items you sell/buy from vendors. Small change but probably it will be balanced better later.
As to others - I can't really say - seems like I have really bad luck and am not getting good drops, not finding items in barrels/chests/etc.
I had to actually level up Lockpicking to be able to open some doors. Probably will change with updates.
I'm expecting balancing and updates along the way.
Also repair is nor working - but that's warrior skill.
