You could the same request into Adobe forums as well and I hope you have. You probably know that you can change the res. of what you bring into Xara products as a bitmap by changing it under the File Menu.
File --- Page Options --- View --- Bitmaps ---- "choose what you want here".
I always use "Import at dpi specified by image file" but this sometimes leads to a very large artboard and low viewing zoom levels.
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