Most changes to the game of any kind are attributable to the dev team. Once in a while player demands figure into it but after reading several quadrillion threads and posts whining about "the devs don't listen" it's logical to assume that changes to systems and features are driven internally. So I'm not sure I get your point.
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Take a look at the news posts sometime. Examine carefully the many ability changes to classes, the many string changes, etc. etc. How many of those are things that anyone asked for?