Well, The builds womt change. You will have the same builds and just start off at 60 to get to 70 and will have 10 more SP at the end.
Most builds shouldnt change much and will still be good but maybe you will see something changed and u want to remove and change it around as much as you like
Not many new skills have been added for example fighters just have a passive buff , so you will have sp spare when u hit 70 , only thing that will change will be prices going down dramatically