Continuing the discussion from How the left-wing party establishment tries to discredit candidates like Jeremy Corbyn and Bernie Sanders:
Starting from your comment, I was reminded of a comment a cousin of mine made who shall remain nameless (he works as a political consultant) that Sen. Sanders is actually very much in agreement with Clinton, but that makes the primaries a little too boring. Part of the drama is actually ginned up to generate interest and keep the Republicans from totally dominating this season.
I personally think that the “establishment” as such has been pretty quiet, and that for all the hoopla the DNC and Debbie Wasserman-Schulz actually do bend over backwards to portray this as a choice between two excellent candidates in public. What I see instead is that they rely upon surrogates to generate enough controversy to get attention from the news outlets. (An example could be how Vermonter Sanders is doing well in New Hampshire polls, so this is played as Clinton being in trouble).
And for the record, though I like Clinton better, I find Sanders a good candidate. I just think his priorities are better suited for the legislative than the executive. The real difference between the two is that Clinton is more tactics, Sanders is more grand strategy.