I dispute your 'empirical evidence lacking'... There is a location noted to be the tomb of Mary. It is empty. The early Christians took great pains to know where the bodies of early Saints and Martyrs were buried, yet there is no record of where Mary's body is, nor are there any relics of her body. In addition, the Orthodox believe in the Dormition, which is very very similar to the Assumption, despite their being separate from the Catholics nearly a thousand years before the dogma was proclaimed.
Ultra Sonic... these sorts of issues is why Cardinal Newman's Essay is so important to understand (or at least be aware of).
No written writings from authority, just from literature considered heresy (Written CENTURIES after the fact) by your own church fathers/Popes. Clement of Rome, Ignatius, Tertullian, Irenaeus, Melito, Cyprian, Athanasius, Augustine, Theodoriet, Cyril of Jerusalem, Chrysostom all closer to the times never mentioned/taught about an assumption of Mary. But 1800-1900 years later from their time it is know considered damnable. Yeah right.