I really don't see that. People have been talking about how great the Swiss juniors look since the 90s, they didn't change their system 10 years ago, that happened much earlier.
Switzerland had the problem that their best junior players never developed into what they were supposed to be. They either didn't have the right playing-style for the NHL, questionable attitude or weren't really interested in making it.
Even back then the Swiss had the better depth while Germany had a few really good players but quite a drop behind those. Sure, the Swiss have developed a bit more since then, but it's not like German hockey hasn't made those kind of steps as well. Germany's depth has become much larger than it used to be. Skating has improved tremendously and we finally reach a stage where the odd player has actual skill and offensive instincts, instead of everyone being a two-way player who couldn't score if needed.
The Swiss haven't really tried anything new. They just sticked to their plan, always played a great system in their national teams and now have the luck that their really good prospects are more like Sturm then an enigma like Greilinger. When it comes to having just a few good players with not much behind those, those players aren't the product of the system, they depend on their individual skill and mindset.