Aye, Fitz used that very term: "the long way." Which is also how Terminator Pops said he'd reach 2015 in (*shudder*) the horrible, soul-draining Terminator Genysis. Reference, or has that particular phrase been used in that context before?
It's a very common phrase. I'm sure there have been countless uses of it to refer to moving through time normally instead of taking a time-travel shortcut. I mean, not taking a shortcut is literally taking the long way. It's not even a metaphor. So what else would anyone call it?