There is more weight over the back wheel so hopefully the aquaplaning risk is reduced?
Would that make it more likely to swap ends when braking?
Less actually; the more weight on the rear wheel, the more is left to push it down through the water film when weight is transferred forward by deceleration.
But for overturn resistance, more weight on the front the better.
The crux of the matter is that no matter where the CG is, all lateral weight transfer during cornering is at the front, because the single rear wheel cannot resist overturning at all.
Therefore the more weight that's at the front to start with, the greater the lateral acceleration needed to completely unweight the inside wheel.
