It doesn't matter what change you make for ranked at all. Rent is cooked regardless of what new rank you add. Doesn't matter if you add emerald to the game ranked as cooked. Either way, there are way too many players that are hooking out a Zen just to make diamond right now you think that they're not going to do the same thing for emerald. These players don't even deserve diamond. The competitive integrity of this game is an absolute joke on console.
I can't tell you how many teammates I've had that have admitted to using A's and just to make diamond if you have to hook up a Zen just to make diamond that's sad.
I have only played 10 days of this season and I made diamond within 7 days of this season. Amongst zens xims and Titans.
Once you make it to D4, congratulations! You're basically Masters. You might as well stop playing.