A colleague and I investigated those overly long shutdown times with a Process Monitor app several years ago, and indeed they are, or were at the time, caused by a bazillion failed attempts to update FeaturedItems even when we have that folder locked down or replaced with a text file by the exact same name. I've always just accepted the wait, minimized the all black window and done something else when it happens and (for me) it's usually when I've had a very short session and quit the game without even saving.
The type of install (disc, Origin, Steam) never seemed to matter.
Much time has passed since those tests, I think they were back in 2017 or something, and there could very well be one or more additional factors contributing by now hence players reporting different kinds of results after trying different things.