You're stating something "is a thing of the past" as in you know exactly how they'll be designing the game in order to come to that conclusion.

That's what's wrong with your assessment. Things "as of now" is already stated to be fairly bad design by players regardless, so obviously things will change in the future (this is a no brainer if you've played MMOs ever) but not necessarily because of a different mechanic. It doesn't mean Darkhold will suddenly be unplayable because you can't move and cast, which is what you were saying.