Drag and drop better defaults

When I drag and drop blocks, I often accidentally drop the block as a child, instead of sibling, of the block target I want.

I wonder if there’s a way to either make it more obvious which will happen (currently you have to pay close attention to the little gray bar) or make the drop target for sibling bigger or less ambiguous.

(I also regularly have trouble dragging to the end of a page, but that may be a separate issue.)