Let me get this straight.
When you place points in a Skill say Barbarian’s Frenzy in the Skill Tree Page -
Then at a certain level, Frenzy opens up the Skill Talent menu where you augment the skill Frenzy with various D3 Rune-like modifiers.
Then there is a separate Talent Tree, which is full of passives, entirely different page, that augments your Skill Tree Choices and your individual Skill Talent menu Choices.
Is that what you are saying?