Straight Edge Seam Marker for UV Unwrap

You should be able to mark seams with a different marker that doesn't split the seam in UV unwrap, but instead allows you to set a straight line. This would be invaluable in hard surfaces and soft alike.

As I imagine it, it would mark just like any other seams, except instead of splitting the UV unwrap, it would force those edges to line up like a straight line on the UV. All other polygons would accommodate this straight line, stretching and shifting to permit the specified seam to work as a solid straight line. If multiple of these straight edge seams exist in one island of the UV, it would shift all other edges and polygons to permit all straight edge seams to remain straight. If necessary, the tool would also scale up or down the straight edges compared to one another to maintain consistency in the UV. This would make creating textures with straight lines and shapes much easier to accomplish without needing to turn your UV islands into star shapes with the seams.