I have an idea
How about attribute points for Diplomacy? Let me share my vision

You would get 1 point every 5 skill from skill 40. You can spend them the usual way. The attributes would be Quick Wit, Charismatic, Forcefull, Spectacular, Logical
Quick Wit the higher the points the higher the chance the cards will come back at their losest possible turn rate, i.e. when a card is 4-12, a very quick witted (30 points thats skill 190) would have a card that is 4-8.
Charismatic, I thought of two options, one was the higher the points the greater chance of starting off with points in flatter so (30 points thats skill 190) would have lets say 70% chance to start off with 2 points in flattery. Opition 2 was, the higher the level the lower the cost of flatter cards, i.e (30 points thats skill 190) a 5 flatter point card would be 4.
Forcefull is the same as Charismatic but with Demand
Spectacular is Inspire
Logical is Reason
I think diplomacy is great the way it is, its good fun but our characters don't really do any thing, except wear the clothes, its all us and strategy, I would like our characters to affect the parley more. This way players could plan for the future.
What does everyone think?