After using for a while, I would be very grateful for a "light mode" for the Location, List, and Inspector. The current color scheme is causing me eye fatigue.
Yeah, I know all the cool kids are into "darkness" these days, but dark color schemes make my eyes bleed. Fine on a mobile phone at night, pretty brutal on a desktop for prolonged use.
That said, I'm reserving requests like this for RM 3.1. Right now I'm sure their priority is to just Make It Work. Since I'm waiting for RM and the OS to come out of beta before I give it a play, I heartily endorse that priority.