From what I can tell of Rare's vision for the game, and what I've experienced in my testing over the past year, they are trying to steer away from layering system after system on top of the characters, but instead seek to keep it simple and allow you to present yourself as you see fit.
Tools to aid interaction, like a "parlay" shout on the chat wheel support their intent, but a ranked reputation system along with pop-up choices of whether to honor requests or not, and all sorts of other menu and stat-based schemes seem out of place here.
They have a singularly unique vision for the game and how it will feel, and this constant need to suggest things from other games does not really have much weight in this particular argument.
Rare isn't trying to reinvent the wheel here... they're building a boat. Suggesting new types of tires for it won't accomplish much of anything.