Overkill implies that the product performs much better than needed for the situation. The problem with Gore-Tex is that it is fine for sailors and fishermen and maybe even mail-carriers, but a cyclist at 80rpm is outputting water vapor at a greater rate than most 'breatheable' rain-wear can deal with. So... a $250 USD Gore-Tex rain jacket doesn't keep you any drier than a $45 USD coated nylon rain jacket does. That's not overkill that's just plain uselessness.

If I ride once around the block, on a dry day, with my coated nylon rain jacket on, I will find a very light film of moisture on the inside of the material. It only gets worse from there. My coated nylon Columbia rain jacket is so thorougly waterproof that the ONLY moisture that I will possibly recieve in any kind of wet weather is from ME. So I wear a fleece or wool long sleeve top under the Columbia or J&G rain jacket. This keeps the wet inside of the jacket away from my skin and keeps me warm. Warm and damp is much more comfortable to me than cold and damp. Even in mild, Northwest winter. FWIW.