Orlandian Multiclassing Rules

So I'd like to try go get some feedback on the following two potential multiclass rules methods. The first is much less interesting mechanically to me. It is sort of the same thing as has ever been done before. However, the second method, the "hybrid" method reminds me of 4E's joke of a multiclassing system, but without the joke part, meaning, it seems interesting and possibly usable to me. It seems like it has the potential to generate an incredible array of different characters by allowing a picking and choosing of class abilities.

Note, in order to fully understand this you need to see what I've done with Class Abilities in Castles & Crusades. You can see that here, and then come back and read these two methods, particularly the second one. I'd like any and all comments on either method (or even on the new Class Abilities ideas). I'm specifically looking for input like "that is way too strong and here is why..." or "that is incredibly weak. I would never use that method and here is why..."

So check them out :) http://sites.google.com/site/ccorlandia/class-rewrites/common-abilities

Classic Multiclassing Rules

At 1st level you can choose to have your character advance in two (or three) classes at once, instead of just one. Choose two (or three) classes. Once selected they can not be changed or dropped. When you use this method you are limited by the more strict of the two classes for armor. You may use any weapon that either class allows, unless one class explicitly forbids that weapon. For example, if one class allows you to only use common, simple weapons, and the other allows ALL weapons, you may use all weapons. If one of your two classes specifically said that (for example) swords are forbidden, they would remain banned. Your BtH advances at the rate of the better class. You roll hit points based on the class with the lowest HD but you add +1 to each roll for each size difference in the HD for the class with highest HD. For example, if you were playing a Wizard/Fighter, you would roll 1d4+3 at each level (1d10 for fighters is 3 steps above the 1d4 for wizards). You must have at least a 12 in the Prime Attribute for each class.
You divide all experience earned between each class evenly.

Hybrid Multiclassing Rules

Starting at 3rd level a player can choose to diversify his character a bit. Instead of gaining a new class ability of his Core Class (the class he began play as) he can choose a class ability of any other class that he could ordinarily qualify for (meaning, if a class has alignment requirements which he does not possess he could not choose an ability from that class).
When choosing an ability from another class the character may choose any ability from that class as if he were two levels lower. He must meet any prerequisites or requirements of the ability (lower number N abilities are always prerequisites for their higher numbered versions).
For example, a 3rd level barbarian normally gets Primal Force 2 at 3rd level. He could choose any 1st level ability from basically any other class by not choosing Primal Force 2. He now may not take Primal Force 2 until he would normally gain Primal Force 3, etc. If the barbarian wanted to be more stealthy he could choose Hide from the Archer class. If he wanted to know some things he could choose Legend Lore from the bard list. Perhaps he would like to be able to cast clerical spells. He could choose Spells 1 from the cleric class. If the character was 8th level, becoming 9th level, he could forgo Magic Strike 2 and take Nock Arrow from Archer, or even Spells 4 (assuming he has already made sure to take Spells 1-3, which he could only have gained by giving up Primal Force 2-4). Maybe he wants the Friars Fast Healing ability.