How do I adjust the position of the label vs. the input field in QuickMode? It appears that the standard configuration splits the columns 50/50. Is there a simple way to adjust this ratio throughout?

Yes, there is. Just add this code to your template.css* file:

.bfQuickMode p input[type='text'], .bfQuickMode p textarea, 
.bfQuickMode p select
{
     width: 55%;
}

.bfQuickMode .bfLabelLeft label
{
     width: 35%;
}

You can adjust the width percentages there to whatever you prefer.

* It is recommended that you add this code to your template.css file instead of the BreezingForms system.css file because you would lose the changes the next time you upgrade the extension.