So I decided to give the new headers a shot, and I generally really like them. However, they always default to full viewport width, at least in left-aligned / responsive mode.
Ideally I’d like to have the header limited to the width of my content. i.e. if I have a dashboard page with 2 sections, the header should be limited to that width too. Otherwise it ends up looking really awkward imo. See:
EDIT: It looks like if you only have 1 column, or shrink your browser window to have it responsively stack everything, the header is also limited to that width. This is exactly what I’d like to have work with 2+ columns / secitons as well 
