The skills aren't going to be from specific classes anymore, it's a pool of 10 skills you can select 5 from, that you earn as you level. You will not be magically earning other classes' skills, you'll be using a selection of skills specially made for your role that add a small amount of diversity. It's simply a different system rather than "catering to lazy players" or whatever, it just happens to make it easier on people who don't have all the time in the world to level their main job to 60 PLUS getting two other jobs to 30-something.