Personally my initial impressions, even as a player, was that the whole core mechanic of 4d6 and each being +/0/- didn't do a good job of actually making me feel skilled in an ability and felt too significant when a single change in category on a -2 to 8 scale is well, a lot. I could live with that though; but having combat stats and your three types of health being skills is a killer for me. I got introduced to FATE as being able to take whatever skills I want for the character and it'd be fine, but I feel forced to take the skills that govern core attributes or to be worthless. TL;DR: I don't like the core mechanic for randomisation, I strongly dislike that core attributes are hidden as skills.