Rotate Artboards
Enable artboards to be rotated individually. Simple. Here's an example of my currently workflow: if I have a large map with a winding road in illustrator, and I want each of my 5 artboards to be aligned with that road, I have to make rectangles where I wish the artboards could be, and then make the actual artboards encompass the rectangle. Then I export as an image, and rotate and crop in Photoshop to match the rectangle. This becomes especially annoying if the boundaries overlap, and I have to export artboards one by one, turning off the rectangles of other artboards.

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I totally get the idea behind the map and the rotated sections of it, and understand the current workflow, but I can imagine it won’t be anything simple to code.
Illustrator doesn’t allow to rotate artboards, only the view, for all of them at once. All artboards stay aligned to the shared global grid...
However this is a very interesting request.