Yeah, from a visual standpoint, this team looks pretty damn boring. A bunch of generic, pretty-faced, vanilla tv people. But I remain confident that Whedon and his writing staff can make them interesting anyway.
Well, they're spies. Spies aren't supposed to be flashy and exciting.
So, given the reports of J. August Richards having an undisclosed role in the pilot, the preview footage, and the on-line speculation, I would think that it's a good bet that Richards is indeed playing Luke Cage. He wouldn't be my first choice for the character, but he's not a bad choice by any means. I think a "Heroes for Hire" series would be a natural spin-off for the MCU, so introducing a character like Cage early on could be strategic thinking.