The DNC is in too much disarray at the national level to throw anyone on the alter. The RNC was there not too long ago and will be there again once they survive Trump. Both parties are long overdue for restructuring and have been showing signs of organizational fatigue for a while.
Trump a pragmatist? I disagree. I think he's an opportunist who values the image of power, success and the relevant legacies of those attributes. I think whoever ran his campaign and continues to do so is the strategist who recognized he was a vehicle for policy. He has to throw around enough red meat to satisfy his very diverse and honestly discordant bases. I mean there are folks like you who recognized he was a means to end regarding SCOTUS nominations and the plethora of other lower court seats. There were those after a sense of catharsis of blowing the entire administrative state up. There were those who compromised knowing he was the only right of center choice in the general election. There were die hards fans. And there were undoubtedly those along the spectrum of entho-nationalist to full on white supremacists who heard the dog whistles someone in Trump's campaign knowingly placed. To just name a few. That's not an easy "base" to consistently appease and takes the concept of "big tent" politics to an extreme.
But at the end of the day I think Trump is just in it for himself, and likely setting Ivanka up for a future run. I think its obvious someone is trying to manage a political legacy like the Clinton's and Bush's of years past, whether its actually The Donald or his handlers is tough to diagnose.