People at the top of the ranks are already chatting about the top four going nowhere. We are all sure 3rd and 4th will swap every round. Eventually, with server coordination, all of the top four might cycle.
THE FIX:
Moves up and down the brackets should be by two factors.
1) Last place should always drop four places. Second place should always drop two places.
2) Extreme point difference should cause a larger change in vertical movement (+ or – 3)
That puts them all in different tiers, and makes the losers work harder to get back up.