I think it's a matter of practicality and working around Moore's schedule. I'm sure it will be a busy week for him to get ready for Super Bowl week and the game. So, it's probably easier for Moore and saves him time if we fly to him. Plus he'll get plenty time in the facility week after next since the Eagles will be using the Saints practice facility for the week. And he also interviewed here 3 years ago so I'm sure he saw everything then.
It's not the usual way things are done but you don't often interview a guy who is getting ready for the Super Bowl in two weeks.