I doubt you know anything about the theology contained in Munificentissimus Deus.
In all honesty I know nothing about the reference you cited. I was born into a Catholic family and went to a Catholic grade school and high school. I left the church in 1969 when I went to Vietnam and didn't examine the truth in the new testament scriptures until 1985. My favorite scriptures are Eph 2: 8-9 and Acts 4:12. I have indeed been saved by grace and born again as Jesus referenced in the New Testament while talking with Nicademus.
If Mary had indeed been "caught up" before death or immediately thereafter don't you have to assume there would have been a major accounting of it??
Also, just out of curiosity, does your reference make any mention of what happened to Joseph??
The best to you.