(This feature might already be implemented as part of the "Profiles like Chromium browsers" thread, but I cannot find out how to access the setting.)
Is it possible to change the color of the toolbar (top bar that includes tab, search bar, and toolbar buttons) to a custom accent color in order to more easily distinguish between profiles? The icon to the left of the search bar is great, but having the option to color the entire toolbar would be even better.
Maybe further down the line, Orion can add support for/implement custom user-submitted themes like Chrome and Firefox have, but that's a discussion for another day.