On the topic of why Zenos's and Fordola's Resonance doesn't work like Krile's Echo, I don't think that the person providing the Echo template really matters. The Echo is the same in EVERYONE who has it. What differs, is how they use the Echo - and different people work out different ways to use it, most often accidentally.

It may even be the case that anyone with the Echo could do what anyone else who has the Echo can do, if only they're able to master it. A bit like giving computers to a bunch of cavemen; poking around, they might each find different things they can do with it, but each has the potential to do anything anyone else can do.