I can't honestly say that I see classless systems as a net plus.
In fact, in practical terms, I only really like "classless systems" when they basically force you to make mutually exclusive choices that push you to specialize and to create the equivalent of classes (different characters with very different playstyles).
You only like classless systems that force you to pick separate classes? That's funny.
Classless systems give you the best of both worlds.
If you prefer a rigid structure with traditional roles you can take abilities that only fall within your strict cookie cutter guidelines.
Others who enjoy the freedom to create unique characters get to use that freedom to pick and choose their abilities and design exactly the character that they would like to play.
