How dare you use my own words... against... Yourself? :P Also, I think I was just the first one to use it in a story. The idea had been thought out before that by others in comments. In the beginning it was purely an arbitrary spell that stopped technology beyond the medival from working.
I guess I made it a Power-stopping spell specifically.
Concerning Imagination and Maelstrom being likened unto the Force, I must disagree. Just as you have your philosophy, I do too. :P I put some thought into it for a Sequal to Imagination Infection that was never realized.Â
I consider Imagination to be a source of raw power. A physical substance that can take on many forms. Gaseous, Liquid, Even solid. Yes, every minifigure has imagination, in the form of a creation spark, and I have adopted the idea that Minifigures also have hints of Chaos as well, and that's part of what makes them not Mythrans.
I also consider Maelstrom to be a substance. Mist, gelatinous, and solid, like Maelstrom-Infected Bricks. In the story that was never realized, Wisp Lee finds a way to generate power from Maelstrom sludge, as an alternative to simply wasting it, and as a way to help with the expanding need for power in the rapidly growing Nimbus City. He argues it's a safe way for consumers to generate power. In my notes I parallel them as "Nuclear Maelstrom" and "Imagination Electricity".
From this point of view, I find it difficult (but not impossible) for the Sorcerer to ban only electricity. In fact, I find it difficult for him to ban any sort of energy at all, without smashing all the minifigures on the planet, if we agree that every minifigure has elements of Imagination and Chaos inside them.
Some good questions to ask:  Are we trying to figure out exactly what sort of spell the Sorcerer cast so that we can effectivly write Dewin and his knowledge? Or are we figuring out how to make the spell viable to the story? Because if it is the latter, then perhaps the spell should fade altogether from the story, because we shouldn't have to force it. I find it entirely acceptable if thedude has been able to circumnavigate the curse, whatever it's parameters are, over the course of 15 years.