I thought you could scan them with the Thaumometer? Or is there something that it can't see?
You can. The goggles let you see them without the thuamometer (goggles are made from two thaumeters). Though you still need the meter to scan them. And you can still see the nodes without either they are just fadded and harder to see and you get no information. Though since they glow they can be fiarly easy to find at night.
But the subject we are talking about is that the Dartcraft wrench removes the need for any of that. You can move nodes at almost no cost, with no risk, and no need to even do any resreach in TC before you can do it. So it basicly breaks a portion of TCs tech tree and messes with TCs over all balance.