If the office has overhead fluorescent lighting, you can swap the bulbs out with specific color balanced bulbs based on what you're looking to achieve, which gives you a lot more control over image without having to worry about "setting up" lights.
Alternatively, if you don't have access to the overhead lighting fixtures in the office, you can always set up some kinos overhead, and supplement with a Celeb 400Q for closeups.
Used the Amira on a narrative short a few weeks ago, and it blew me away. I think it would make a great option for indie features. It's lightweight, the built in ND was incredible (we shot f2's for most of the shoot), and for the amount we were shooting per day, we needed to switch cards once, maybe twice a day. It has a user friendly interface, and the image quality is beautiful. If the specs match up with what you're looking to shoot, I don't see any reason why someone wouldn't use it for a narrative feature.