Naaa they used him because of his awesome acting.. trust me bro.. I know these things!
As I've said, I don't want Waid doing dark DD. His idea of dark pisses on the good writers even more than he's doing now.
I appreciate Dinklage having that role, and I assume it's an irony that he's cast as an anti-mutant character, so his stature is relevant, and an interesting use of it. Minority actors constantly need to look for breakout roles, and that's an example of a good one. Some years ago, Dinklage had a supporting role in an awful movie where Gary Oldman played the lead, a little person, while walking on his knees.
As for Stick, it's a minor example, and Glenn really does look good, but I'm sure Asian actors will at least see it as a missed opportunity.
Maybe his idea of dark just doesn't work for Daredevil. Have you ever read Irredeemable? It was plenty dark and a very well written story.
So much for darkness. I just skimmed down CBR's solicits for that month, and not one Marvel comic looks remotely as cartoonish as this. When Waid first moved DD to SF, he promised the return of Stuntmaster. That would be worth a whole new volume just for that. And here I thought he forgot. Two men without fear? Can a new writer bring back Matt and kick this imposter back to 1961 DC where he belongs?
As for Danny posing as Matt, it was mostly trivial, a concession to comic book gimmicks to give Matt plausible deniability about his secret identity. Maybe Waid didn't read it. Danny/DD had more space in the Whiter Tiger mini than anywhere else, and there was no real story about him. In Civil War, I only remember that he mostly hung around the background of Cap's group. I looked at the time, and remember him doing and saying almost nothing. I thought when he took his mask off in a few panels that he looked more like Matt, which made me wonder if Millar or the artist even knew what was going on with DD (as per Brubaker's quote above), though at least they knew not to have IF appear.
It took Iron Fist almost a whole other volume before he started being a valuable member of that team. Even during Initiative, Dr.Strange was pretty much the whole team, with rare Wolverine & Spider-Man moments after Cap's death. That team was a mess. Most of the members didn't really do much. They didn't even know who the leader was (It was Cage) until Dark Reign.