The only field aether current I really hate going for is one in the Lochs that requires going halfway across the zone, through the crypts, across another plateau, and then jumping across a wall to reach it. That one can go straight to the lowest of the nine hells.

I don't mind the current system (as has been mentioned before, there are much worse alternatives), but I wouldn't object to seeing the field aether currents reduced or removed for past expansions. The quest currents work well enough as a broken bridge to keep people from going to the wrong parts of zones too early where that's important (the Sea of Clouds, Azys Lla, the Fringes, the Peaks, Ahm Areng, and Kholusia).