Ref the chassis, whilst the latest chassis with the triangulated front end has got to be a lot better, I don't think that the 2013 chassis, with the small gussets, has actually parted company yet? OTOH, MMC state that they have no records of any chassis problems. Go figure, [as our cozens on the other side of the Atlantic might say].
Also, we must not forget the importance of the louvres in the back panels, allowing the air from the spinning rear wheel, to be expelled, otherwise it is known to cause lift, with the associated problem of lack of rear traction, especially on roads with either grass or gravel down the centre.