It'd be nice to have more control over sections. Simply 'keeping in' row or 'forcing new' row is enough in most cases, but I think we could get more out of a form if we could:
*Stretch full width when going 3 columns wide *Have an option for a SIDEBAR type section. Here, you'd go 3 columns wide but have a section that could go from top to bottom without pushing the next row(s) down. It'd consolidate the realestate and lessen the whitespace.