proposed multiclass feat system

i wonder whether this method might be more effective . . .

I. one multiclass feat to rule them all:

i) choose one of any class skill;
ii) ability to use all class weapons or implements;
iii) access to any class feat; and
iv) access to any class paragon path and epic destiny.

II. one class powers feat:

i) ability to use one encounter, daily AND utility power of the class; and
ii) prerequisite of the multiclass feat.

III. one class features/powers feat:

i) choose one class feature;
ii) ability to use one at-will power, and a second encounter, daily AND utility power of the class; and
ii) prerequisite of the class powers feat.

witches

i understand the fluff reasoning behind a witch being a subclass of druid. i also understand the nonfluff, powers-based reasoning behind the witch being a subclass of wizard (however, witches sharing space with a class that iconically gains its power through academic study does rub me the wrong way).

i generally am not a fan of the dual power source builds, but i think the witch as arcane/primal makes a lot of sense, fulfilling both of the reasonings referenced above. also, witches could be obtaining their powers from the more indifferent and darker primal spirits of the world and feywild (yes, there are some primal spirits in the feywild), instead of from gods, devils and the like.

EDIT: with primal as a witch power source, then the cat, raven and serpent familiars make more sense, since they all are natural creatures (one tiny fey familiar--such as a brownie, a grick or a puck--would be a nice option, to more closely associate the witch with the feywild).

more on the far realm

the far realm inherently is a threat to all of the known planes of existence. wherever aspects or creatures of the far realm populate the known planes, the immediate surroundings slowly warp from their natural state into some semblance of the far realm ("Their presence in an area infuses it with the Far Realm’s blight, and the spreading madness invites more incursions from beyond. Dungeon 194").

thralls of aberrations are affected by this far realm influence, sometimes eventually losing their sanity (kou-toa) or outright transforming into aberrations (foulspawn).

warlock changes

the warlock should be changed to an A-class with cha as the primary attack stat. they negotiate and bargain for their powers, so cha is appropriate.

fey should be cha, int (eladrin, gnome)
infernal should be cha, con (tiefling)
dark should be cha, dex (drow)

also, dark pact should have referred to the shadowfell, rather than to "the dark beings that lurk in the shadows of the drow civilization."

EDIT: the dark pact should be subsumed by the gloom pact.

sorcerer changes

the sorcerer should be changed as follows:

i) con as primary attack stat (wizards learn their powers, so int is best; warlocks negotiate and bargain for their powers, so cha would be best; but sorcerers are innately empowered. their powers flow from themselves, so con would be best);

ii) chaos sorc renamed elemental sorc, with con primary and int secondary (genasi would be the ideal race); and

iii) dragon sorc with con primary and cha secondary (dragonborn would be the ideal race).

cambions

many cambions are half-drow. many others are half-duergar. this is is due those races' close association with devils.

EDIT: yet other cambions are half-goblinoid (most typically, half-hobgoblin).

the ghoul king

was an orc.

many, although not necessarily most, ghouls were orcs.