Can I make a Shepherd with blue eyes and short blond hair?
On topic: Too much action. I know you're itching to get your Return of the Jedi on, Bioware, but please remember that not all of part 3 should be run-and-gun action. Give me some political maneuvering in the teeth of destruction; some rallying the masses; some touching personal asides that bring depth and flavor to the mix; some desperate flights from lost battles; some hiding in a tent in the wilderness. Don't play this one straight, sirs - make an ending worthy of Mass Effect 1 and 2, not just the combat half-and-a-half of ME2.
Oh, and stop courting the CoD jocks. They weren't with you from day one (technically day 180 or more, thanks to your xbox focus) like we were; they don't deserve your attention. They won't appreciate your universe or your codex; your characters, both good and ill, will mean nothing to them. They will treat your game like yet another shooter - play the campaign, perhaps; but mostly just play multiplayer until it gets boring and they move on. In the words of a very old book, "Give not that which is holy unto the dogs, neither cast ye your pearls before swine, lest they trample them under their feet, and turn again and rend you."