As much as you say, the SNP have done nothing whilst in Government, they are trusted to deliver a lot more than any of the other parties, there is a predicted landslide for the pro independence parties at the Holyrood Elections in 2016 after which I think things may just get a little bit interesting again.
The very existence of a (projected) landslide for pro-independence parties is evidence for the divisiveness of the SNP's narrative.
Absolutely right on doing nothing though. Sturgeon has made a nuisance of herself by renegading on her promise not to get involved in English only votes, but beyond that the SNP have achieved bugger all. Meanwhile in Scotland their track record of governance is absolutely shocking.
As John McDermott says
(very long but overall excellent read):
Research by Ailsa Henderson of the University of Edinburgh has shown, Scots believe the country to be more left-wing than its policies suggest. Middle-class Scotland is getting the best of all worlds, notes Hunter Blackburn. The SNP repeatedly tells it that it has kinder, more generous values, but it is not being asked to forego any comforts or privileges. Indeed, it often receives more. No wonder it is not inclined to ask too many hard questions.
Over the past decade, the SNP has proven itself to be the most successful political party in Europe. It has won seemingly impossible majorities in Holyrood and of Scottish seats at Westminster. Scotland is now a democratic one party state. And from next April, it will be by some measures the most powerful devolved country in the world. Yet if politics is about power then policy is what you do with power. And the SNP has done very little indeed, especially for the poorest Scots it now claims to represent.
The SNP has mastered the art of blaming Westminster for everything - even the things that are directly under their control.