It's clear for me - you don't change spec either. You play what performs the best and you stick with the conduits, legendaries choices.
That is how community works - they should stop making a thing like this and go oldschool. It really doesn't make sense for me.
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They want it to be different like in Diablo - you can create different buildups and combos. Problem is as everybody knows - the systems are not baked/half-done. Even then - you still face the problem of just going with the most popular builds. The only expection of success would be some occasional sologame(like Diablo where you can afford messing up and you don't have to meet up some minimum requirements as a team).
The best was in MoP - you had a quest and you would end up with a legendary cloak(just like everyone else) - nice and simple and easier to balance. No conduit, no covenants bonuses etc. Just a massive boost.