I think it will be a few years before a DA42 (and Mr Dries) will be trusted again by people shelling out their own £400k or whatever, and a SE TP is always going to be a lot more reliable than a piston twin.
However I think the E500 is too expensive, but this is because it is a victim of the standard aircraft marketing philosophy which is that no buyers are positioned between the high-end piston market, and the traditional PT6 TP market.