Are there any indications that this is meant to serve as a gold sink? I think someone linked something indicating that it’s meant to act as a deterrent to respecc’ing often, encouraging players to focus on a role, and also making choices matter.
I could be wrong, but either way, I don’t think dual spec is really a good solution, because I haven’t read a well defined description of the problem that it aims to solve.
So, you want Dual Spec, because it makes the game easier. Is the game too hard to be enjoyable? Is that a problem that requires solving?
My thoughts on Dual Spec as a solution: