One way (My way, and therefore clearly the best) (that's a joke) (but that doesn't mean it's not true) to understand/articulate the dogma of the Assumption (whether or not you agree) is this:
Mary currently enjoys fully all that all the blessed will enjoy at the consummation/eschaton/end of the trouble beginning of the party/however you think of it.
Our bodies WILL be resurrected and restored to ourselves. Her body is already resurrected (or, some say, she never died but was taken up like Enoch and Elijah).
So when some king or other expressed a real desire for a relic of the Virgin, the monks or whatever drew straws to see which on of them got to say, "Um, your majesty, sir, your extreme greatness, ah, you see, we ain't GOT no relics, on account of we ain't got no body, on account of ...."
What is the authority - where does that news come from - for determining Mary is bodily in heaven?