I just did the Kill Scarlet part. In the final cutscene you can see the drill hitting the intersection of ley lines, redirecting them. If you poke around the control panels after said cutscene you can get some dialogue from it (engineers get more detailed dialogue).
‘Scarlet intended to disrupt the ley lines, not tap in to them’. The ley lines are now redirected to feed possibly Mordremoth, you can see them traveling in the direction of the Maguuma Jungle. You pass through Kryta > you see Thaumanova > passes through an arid wasteland and back into lush areas again.
I’ll put up a video in a bit, skip to the last few minutes for the cutscene and the various dialogues.