Can you send such a QDS file to info@soscisurvey.de? We can tak a look and see, if there's a realstic option to implement an import for that format on short term.
I am not too optimistic, and I am quite sure that filters will not survive the import. But it's worth a look.
Should it not be possible, it's still quite fast to open two browser windows, open Qualtrics in the left one, and SoSci Survey in the right one, and copy the questions. But an import would be more elegant, of course.