Nobody would build a stadium in the middle of nowhere. Marcus Aurelius reigned AD 160-181, yet you tell us in #384 that the rebuilding was in AD 121, for which no citation can be found. The Turks tell us the City was abandoned AD 194 after another earthquake. Your chronology here seems to be all screwed up, as does the idea of an Emperor building a stadium in an abandoned city.
Like I said, dig up some archaeological citations for the dates of the earthquakes, the status of the city, etc., and then come back.
Confirmation of two Richter 7.0 earthquakes in Laodicea, AD 60 and AD 65. Some sources date the second earthquake in AD 66; it's a small matter.
Since it is difficult to find much evidence concerning Laodicea after AD 66 until much later, I'll allow that the Stadium of AD 79 represents a post-AD66 "rebuilding" to some extent... although we've no idea how much of the city had been rebuilt by that time.