Okay, I'll simplify. I apparently agreed with you that one of the reasons Dreiberg wasn't used was possibly because of his affect on Laurie's storyline. However, I completely disagree with your belief that Dreiberg wasn't used because he was a "straight white hero stereotype."
But I also think that Dan's role in the heroes as a leader made him harder to fit in, and as Lindeloff said in the interview, they couldn't figure a plausible or "easy" way to link him directly to Angela. How would they hve even gotten him to Tulsa? I mean, they could have gotten him there, but would it have not have seemed "shoe horned."