At the same time, players just keep assuming its already cross server Arena since 2.0. Which is clearly not. They never said it was cross server arena, but only cross server Matsuri, but yet, players still complain that matching is forever even when its cross server arena (which its not). Cause its one of those, he said she said.

Possibly those who haven't still can go for 6 Paths to get the rewards when it eventually appears. Imagine if there's those stuck at Anbu, and they disable Ranked Arena and do only training, when the reward kicks in, they will get that Anbu one instead when they could have started off with a 6 Paths as well. Not as if reward appears they give you Ninja Star Student, everyone gets the rewards based on what their rank was when the rewards kicks in.

When its put into play, you get what your current rank is and it resets (if you are 6 path, but maintain if you haven't reached 6 path). It doesn't all reset to Ninja student and everyone starts from there.