The days are too short in October even with split tees, I would think. Less than 11 hours of daylight and dwindling rapidly as the month progresses. Although Kent is dry by British standards, that's still the wettest time of the year there too. They would have to use two courses for the first two rounds to even consider it. Which would be awesome if they used Deal for that, but no such luck.
Speaking of two courses...how great would it be if they used both courses at Winged Foot for the first two rounds? I know it won't happen, but a man can dream...