The issue with the Greeters' laser fields is that they "rotated" around the Greeters. In a 2D space this is somewhat easier to pull off, but if we had Connel's idea of a "floodlight" style laser field (which I actually think is pretty cool) then we'd be constantly seeing the laser field fall off the edges of platforms as it rotates around the Greeter.
Also I agree that laser fields were pretty dumbed down for NnT. The inability for laser fields to overlap made complex puzzles much easier.
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