i think he's saying that by using both a super charger and a turbo charger at the same time, they may be adding too much complexity. this could be a big problem, as VW has been suffering from lots of quality control problems. removing one of the systems and bumping up the engine size will make the whole thing simpler overall, and theoretically less prone to problems.

maybe they just couldn't get that kind of fuel economy with those kind of power and torque numbers any other way. anway, we'll just have to wait for a few years to see how reliable the thing really is.