Great information BillyBob,
You seem to be the go-to guy for info on VBLs. Having found an adequate solution for me personally, it never occurred to me that others might have such difficulty in finding a balance. Do you think people are having trouble because they are overheating, causing excessive sweating?
As an experiment, I've been wearing a pair of merino baselayer pants, with my cheap rubberised waterproofs over them, all today while doing my normal chores. i just checked my legs etc. for moisture by the simple expedient of dabbing with a dry tissue. Result, it was completely dry.