The challenge log is new. The book upgrade system is new and that part of the atma quest line I really like. Sure it's a bit grindy but there's a real feeling of progression as your completing it as the boxes get ticked and your weapon get upgraded. As someone mentioned previously tying the atma's to the challenge log (think of it as proving yourself as an adventurer to be worthy of the items). It would have been a very nice alternative to the lottery we have now.