Why change it? If I read your comment correctly, allowing the points to apply cross-class would end up with 60 bonus points in most stats, something I'm sure they don't want to happen. Or assuming someone adds the 30 points to one attribute no matter what class they played, it would end up with +240 points to one stat...very unbalancing to say the least. And if you capped it at 30 per attribute, then you'd have leftover points.