Um, I have a few. For example: Those don't deserve to be full classes, as they are perfect examples of things which should be themes or backgrounds rather than full classes. [...]
Again, those made perfect sense to be kits (except monk, which they changed back; and Assassin, which is debatable).
What is a Thief-Acrobat but a Thief with some acrobatics skill? What is a Cavalier but a Fighter or Paladin who owns a horse? What is a Barbarian but an angry Ranger? Actually, why should "barbarian" exist as a class at all when it is obviously a cultural thing, and you should have some people of "barbarian" tribes who are magic-users, or thieves? Makes more sense to make it a theme or background.