Originally Posted by
Smog
I would argue against drawing a direct parallel to Diablo 3. Diablo 3 has systems in place to help curb the rng, and allow you to focus your efforts to attain the pieces you really need, through Blood Shards. There also isn't the element of competing for a raid spot.
Diablo 3 also requires a much smaller investment of time to get your build online. You can get your set bonus and most required legendaries in a few serious nights of grinding. They may not be the absolute best stats, but you'll be able to get up to 80-90% performance pretty quickly within a few days of a new season starting.
This system, as Artunias is describing it, is far less forgiving, and not able to be focused in the same manner. It's complete rng and gated behind mostly group content (as the emissaries are not infinitely repeatable). If you could somehow farm for the specific legendaries you needed for your spec, that would perhaps be more acceptable, but having a 30% dps increase gated behind absolute rng, and any legendary you do manage to get having basically a coin flip's chance of being useless, is pretty brutally unacceptable.
That's D3-at-launch levels of rng, grindy, rage-inducing disparity.