The artificer's family history of designing metal warriors (or mechanical suits). Pemberton is replacing people with metal duplicants, so it's an interesting parallel.

Might Boyd also have an affiliation with the Vekeshi? I ask only because that theme always felt to me like it should be played out in secret, not writ large, given it is a clandestine organisation. (One of my players was a martial scientist, but also a mystic.) The vekeshi subplots are well worth exploring. (In fact, it's the only theme that involves an actual plot rather than occasional bonuses and areas of interest.)
It was the Danoran tiefling general who pretended to be the guy who killed him, right?
I suggested the theme to Boyd's player but he wasn't really interest. I think the guy who plays Bruce may "double dip" (in roleplay terms) in that part of the story.
Also, I think the Vekeshi mystic theme is one of the hardest to integrate (the Docker theme is a tough one also, even if it's too awesome to pass). The player guide sells it as some sort of stonemasonry association with a strong edonistic side, but in the actual story (as far as I got) they're precisely what Vekesh seemed to preach against: a bunch of eladrin fanatics who manipulate people in order to push them to become hitmen and get revenge on humans.
I think it can be a good thing having players try to become part of something that isn't exactly what they expect, but I don't think the Player's Guide sells it to the prospective players in the most efficient way. Even the actual powers, and the awesome Paragon Path, are about the most brutal and borderline horror-movie worthy stuff - so much for the "enjoy life as a revenge against your enemy, we're gonna burn you alive and resurrect you until you become one with the sacred fire. Yikes. I love it, but my players were a bit confused.
Quick question about using 4e, if you have time: Does the character builder still work? Or are you guys somehow managing without?
From a roleplay perspective, though, if Boyd knows Gale, surely the Vekeshi might at least approach him to try and send her a message in adventure 2? (I guess no one needs to be asked to assasinate Rock, though. It doesn't add a huge amount.)

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.