Certainly! Think of this as a deleted scene, considering that it didn't survive to the final cut of the Epic.
The Man With the Blood Eye Brooch was recruited by Grima in furtherance of Saruman's plans for the Kingdom of Rohan, alongside some others (who you root out while working in Edoras). Unlike those allies of Wormtongue, however, this man's true allegiance is to Sauron and the Black Numenoreans who follow him -- his loyalty is unknown to Grima, though Saruman would have been able to discern it fairly easily. The extent of this man's evil is rather deeper than most of Wormtongue's lackeys, as is his cleverness, and he has a glut of false names he uses as he travels: Ednoth, Góding, Ianbert, Merewit.
The player loses his trail after the town of Stoke, partly due to his ability to travel safely among the Uruks, but also because he can blend into the populace of Rohan, given his similar complexion. As a result, he easily joins the defenders at Helm's Deep, and would be one of the characters players interact with during the preparations for defending the Hornburg. Players would piece together his identity shortly after the fighting begins, and we would have gotten some tension out of the knowledge that someone on our side of the wall is working for the Enemy to sabotage the defence. When Gimli is separated from our heroes and ends up in the Glittering Caves, the idea had been that Our Traitor would be there with him, getting ready to stab him in the back when the opportunity presented itself. Obviously the attempt on Gimli would fail, but the traitor would have managed to slay some other defenders in the attack.
I know we sometimes get dinged for 'tricking' players, especially when we plant enough seeds that you guys can say 'But *I* knew this was the traitor! I would never have trusted him!' so I think ultimately removing this part of the storyline was a good idea. The Man With(out) the Blood Eye Brooch therefore lives to possibly complicate things in the future, but in the story as implemented he disappears after Stoke and his whereabouts are unknown.
Also: I don't make the decision for what rewards go where (and it's a good thing, because that's not remotely my area of expertise), but generally we get criticized for not having valuable-enough rewards, not for having rewards that are so in-demand you have to have them! So I apologize if it's tedious to go through long quest stories to get a valuable Trait Point, but I do like rewarding players for playing the Epic. So it's a tricky balance (like so many things!).
MoL