What I'm interested in are the important differences between 4e character sheets and other character sheets that make noble diplomats feel less like noble diplomats.
If Number48 isn't interested in talking about this, maybe you are?
I'm perfectly happy to talk about this, as long as I believe you're engaging in good faith.
For me, there is a large difference in emphasis between 3E and 4E characters; 4E characters have, in general, a much larger number of dedicated combat abilities and also have little in the way of background skills (ie, crafting, profession etc). This, to me as a player, implies that their definition is largely built around what they can and cannot do in combat.
If I'm playing a certain kind of noble diplomat character, I might want to play someone who relies on his bodyguards to protect him; someone who is not necessarily good at fighting himself but relies on his companions more if battle erupts. My emphasis would instead go into other areas: an extensive skill list and knowledges, for example. I might be a bard, or a cleric, or a rogue or a fighter or anything; I'll put points in my mental stats and I probably won't be that good in combat compared to Conan.
4E makes it harder for me to shift my emphasis as a character away from combat. All the stats can be useful in combat: if I'm smart, I'm also somehow good at avoiding blows and leaping out the way of explosions. I will also, by necessity, have combat tricks exclusive to my class (moreso than would be the case in 3E or older editions). I'm tougher, in terms of pure resilience to damage - at first level, it takes several sword blows before I drop.
Now, I can be all those things and still be a noble diplomat; but not in the way I'd envisioned for my character. And it isn't the presence of one or two things that change the feel of the game, but the preponderance of them.
I hope that answers your question.