I really dont think you will ever get this, besides maybe a certain plot point in a game. Dragon Age franchise has moven from RPG to Action-RPG.
In DAO you had TONS of conversations options, and choices. Many were actually going to the same result yeah, but you could roleplay what you were choosing and that was really fun. And there were a lot of differences depending on who you were. That was RPG in the sense of conversations and putting the personality you want in that character.
However, in DA2 and DAI, you have a wheel so you just choose between certain "directions" were you want the conversation to flow, you cant even roleplay since the personality is imposed to you. You dont even know what you are going to say for certain. Voice acting has a lot to do with this decision.
So I am sorry but I dont think you will ever get what you want with Dragon Age. It is not that you are asking for too much, its just that you are asking for the opposite direction of what Bioware has decided for Dragon Age.