Not sure if this is a pro feature, but on the main edit form for the meta. try adding .custom_extraspace{min-height:100px} in the CSS panel. You may have to play with the pixel size to get the right value, and dont forget to test with responsive screen sizes! 🙂 But to make that work, you will want to put custom_extraspace in the class box on either the input above the space, or the input below the space. Your mileage may vary, but some variation of that might take care of the extra space. You can also with pro try adding a custom HTML and just put <P> in the Content Box to force an extra space.
I just created some TItled headers to separate sections with
<h2>Title Text</h2>
in the content field. Then dragged the input field up to between the items where it was needed.