Yeah, it's a drag if you have to re-import thousands of them, because you installed a "yet another new and fast" computer, and MC just gives you another puzzle to solve, how to locate the failed files. Mostly due to plug-in failures or the absence of them.
Though, if you just do a second import on top of the first, and then show the details, the list no longer contains the imported ones. So it's gets shorter and more or less readable.
None the less, such a feature "show only failed ones", or better "save the failed ones" would be welcomed.