I think the Warren from last night is the authentic Warren, and the watered down version that lost her toehold on the nomination was the over-consulted to version. One of the worst features of modern American politics (and there are a lot of bad features) is that there is a large consulting class that hovers around candidates looking to hoover up their money in exchange for terrible inside-the-beltway recommendations that largely amount to moving to the middle to where lobbyists can make more money. When people complain about lack of sincerity in federal politicians, a lot of it comes from this consulting class and their outsized influence. They polish up candidates to be appealing to insiders, which is almost diametrically opposed to what is appealing to the general public.