Hmm, design clever....when it means EMUs with motors in passenger areas, no route direction lighting (1950's model did), one design fits all Pacifics, etc. No I don't think so, when Hornby can turn out more than half decent freight locos and fine coaches. In truth, design clever is making the most of 'old' assets and a poorly scoped design for new runs. I thought I saw a model which was fitted with a new chassis and old body, so a compromise there. Railroad is fine as a starting point to clear the old stock, but to apply its principles to new models will inevitably be a mistake.
As far as EMU, or DMU, power units are concerned, I would have thought the motorized chassis design as sold by Replica Railways would be the norm for design features. Now that's design clever. One design feature that should be taken up, where coaches are concerned, is to get rid of the clip on feature and replace it by screws. It would make life a lot easier when populating or fitting lights, for instance. I appreciate that some might say that this would involve extra costs, but coach prices have increased so some extra allowed for these changes would be worth it.