Just a very minor question but is there a way to have the modifiers panel contracted by default? Shipping an advanced panels both seem to be hidden by default and I'd like to do the same to modifiers to make things as clutter free and simple to use from a system administrator's point of view (they seem to get overwhelmed when they see so many open fields all at once when they only need price and SKU.
It's not possible to customize the look of the Store product details field, without adding your own CSS to the control panel (or editing the Store view files).
One option you have if you need to do this is create an extension which uses the
cp_css_end hook to add your own CSS to the control panel, which hides the fields you don't need.