Yeah, that would be a bummer, especially during a lights out mode. Already I wish more lights would go out but with an additional lighting kit in there, it probably would be even less of an effect. Especially fun is playing lights out in a low lit room and then hitting free game... it's like OMG I'm Blind! I'm Blind! lol.
I have the Winki light which I think addresses my number one lighting issue (but I need a new clear winki)... The only other play field area I think could maybe use a tiny bit more light (and not much) is the haunted forrest. But then again... it's supposed to be dark and spooky right? I think maybe a little focused upward light on the trees might make it pop a bit more while adding a bit of a spooky effect? Don't know.
One way to think of lighting the play field is like a stage. While you can go crazy and completely blow it out, it's often more effective to leave some area's unlit. Shadow is equally important, if not more. For example, with WOZ, you may notice that while up on the Rescue play field, the lower play field in a way forms a shadowed area by switching everything to a dim sepia thus subconsciously drawing your eye up to the area where the action is occuring.