I think you are exaggerating the doom and gloom of the state of this team here.
This team is not struggling because they are built terribly (and I am someone who has been critical of how they are built for years now - it is true that they are not built great and they are built terrible for the playoffs, but that is not the huge problem that is ailing them during this regular season.)
They are young.
If Dahlin, Power, Samuelson, Quinn, Peterka, Benson, Cozens, and Krebs were all 25-29 right now, this team would be smoking teams just on talent alone.
Granato's system has moving pieces. The players are expected to be interchangeable and then adapt to the given situations and it doesn't have a lot of structure.
For young players learning defensive responsibilities without a rigid structure, there is going to be expected growing pains. For the few young players that are playing without experiencing nerves of playing in the NHL, the transition will be hard. For most of the kids that are still experiencing nerves everytime they step on the ice, the process is probably quite daunting.
For these young kids I personally feel strongly that more structure is the better way to ease them into the roles. If they have a simplified job and they know what to do and where to be, they should be more effective and their adjustment should be a whole lot easier.
Granato is trying to do "more", but I don't know if his young team is up to it.