I posted about a similar issue in the Lumen feedback thread about how if you set the sunlight to a realistic intensity, it blows out the light complexity view, however I never got a reply.
I assume that having a higher albedo (or a high intensity light) is supposed to require more bounces since less energy is absorbed. In practice though I find that the albedo/light intensity don’t actually have any visible impact on the amount of visible bounce light beyond a certain point. It doesn’t matter how bright your light/abledo is, you can’t ever get more bounce light than what you’d see from roughly 3 bounces in the path tracer.
I’ve just been ignoring the complexity view honestly, it seems to be mostly useless. If there is any performance difference between a scene with white complexity view vs. blue, I haven’t been able to detect it. Given that it seems like Lumen can’t resemble the path tracer past 3 bounces, I can only guess that they were capped at some point and the complexity view was never updated to reflect that.