I think lighting is a tad bit too dark and should be made brighter.

[Roomba]

I would like it if there were more ways to mitigate it other than 'more lights', though. Thinking mostly of roles like AI, blob and vamp - the former two often end up having to scan low-lighting areas for threats and can barely see them, and as for vamp I find Cloak of Darkness near useless since it doesn't matter if people can't see me when I can barely see anything myself.