I picked the Illusionist. It was a too focused class that had wide open spells that did only 60% damage. The beguiler was a much more complete class by adding in enchantment, it also makes a good match for bard. It just never made a different enough class than a lesser wizard.
I will defend the paladin/ warlord. The paladin started off as a very tightly differentiated class with unique mechanics and a strict code of conduct. The class has become more forgiving but more generic as a result with little to differentiate it from a martial minded cleric. The warlord, cannotations of its name besides, fills a similar niche of the cleric, buffer and healer. These can be great classes but they need to be more clearly defined. Paladins being champions of a virtue and gaining some of that specialness is a good start. But both the warlord and paladin should make members of the group better. They shouldn't just buff, they should make the other PCs shine at their role. Hopefully, 5E will give these classes the tools to bring them out and maybe a name change for warlord. Commander? Bah.
The psion and psionics would be a better fit if the psionics system is in place from the start. How do they make the psion something more than the psychic wizard? If they answer that they need to be in the core, if not the class should be splat optioned.