More power, precision, and refinement come to VW's redesigned 315-hp hot hatchback. The hot-hatch genre has, at times, made us feel very old. Our younger selves would have happily tolerated a bouncy ride, a laggy engine, or a raucous cabin if it kept the price low and the fun-to-drive quotient high, but our backs, our patience, and our eardrums aren't as forgiving as they once were. Volkswagen seems to understand. We recently drove a Europe-spec VW Golf R around our Michigan stomping ground and concluded that it stays true to the franchise. The new Drift mode may be the star in the highlight reels, but the Golf R's distinguishing trait is that it's so much more well rounded than your…