I'd like to know if it's possible to manually drag text content from the structure pane directly over pre-styled text frames and for the incoming content to retain this styling rather than default to basic/no paragraph style. Mapping styles to tags isn't going to work for me here.
I have the same issue. I have basic unmapped XML and I hope there's some shortcut, maybe a key to hold when dragging from structure or something similar, to ignore the default styling. It would save a lot of time each week.