I´m sure we will see a future PH2 and PH3 of 5th Edition, and it may new "the complete.." without classes but theme or subclasses.
I think some archetypes like knight or samurai can´t be only a theme or subclass character, but a complete independient class, and a good class isn´t a different list of powers but a unique identity and a different gameplay.
Templar from Dark Sun can be a subclass of cleric.
Necromancer or elementalist could be a built for wizards, but complete class too could be posible.
I like knigth and gladiator (from Dark Sun) like complete class.
Ninja is too cool to be only a subclass of rogue. I say equal for samurai and sohei.
Beguiler and spellthief coud be subclass, like hexblade, and swashbuckler, warmage, (a warrior of light armour would be better for small size PCs).
Binder (from Tome of Magic) could be a subclass of warlock. Different "vestige" would be like a temporal and flexible "built".
Dragonfire adept (from dragon magic) would a subclass of monk.
Lurk (complete psionic) would be a sub-class of rogue.
Soulknife a subclass of physic warrior or the monk.
Assasin would be a complete class, not a subclass of rogue.
Invoker and Avenger would be subclass of inquisitor/witch hunter.
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