i don't think anyone's holding up the sanders campaign as a model in terms of national strategy, more that his policy ideals are important if we want to find a way forward for the democratic party. though it is really impressive how well he managed to do as a party outsider with far smaller donations and basically every democratic power-broker including the president lined up against him to anoint clinton.
I'd say Trump breaking the Republican party was more impressive. He pretty much had the whole party lining up to murder him in the primary, while things only got slightly heated in the dem primaries.
That being said, what does his policy ideals have to do with winning an election? Yes, Hillary should've advertised more about the future that her policy solutions would bring about and yes she made some campaign mistakes. But accepting those as facts also means accepting that Hillary didn't lose because of her policy positions but rather her campaign strategy.
And, to be clear, I don't think any one of those things alone are what sunk her campaign. You can't divorce all the other factors that were at play in the election either and very little would have to change in the electorate for the result to be a Hillary win.
If the only negative factor was the wikileaks stuff and she campaigned better? She probably would've won.
If the only factor was her campaign mistakes and the wikileaks stuff didn't drop? She probably would've won.
If she was as charismatic as Michelle Obama with all the other mistakes and outside problems? She would've won easily.
It's harder to pin down what effect her policy positions had on the outcome because the vast, vast majority of the voting base doesn't get anywhere close to looking at the details of candidates plans. I'd go so far as to say it's the
least important aspect.