Changes Division Rivals in Season 4

The first change is that they removed ranks 2 and 3. Now there is only one rank in each division.

As you can see in this screen, there is only one rank and the progress from DIV 2 to DIV 1 needs 12 victories ( or 6 in a row ) to reach DIV 1. You can check that now there are 2 checkpoints that you will reach with 3 or 7 victories. No doubt that progression to the next division will be more difficult as between the last checkpoint and the next division you need 5 victories in a row.
This progression changes from one Division to another.

Instead of 3 wins to earn the Weekly Rewards, you will need 4. You will still 4 more to get the Rewards Upgrade. So you will need 8 victories to earn all rewards.

Rewards have been slightly improved for instance the Elite ones now are

• Base Rewards
  • Option 1
    • Jumbo Premium Gold Players Pack (tradeable)
    • Rare Gold Pack (tradeable)
  • Option 2
    • 2 x Jumbo Premium Gold Players Pack (untradeable)
    • 2 x Rare Gold Pack (untradeable)
  • Option 3
    • 1 x Jumbo Premium Gold Players Pack (untradeable)
    • 1 x Rare Gold Pack (untradeable)
    • 17500 coins

• Upgrade Rewards
  • Option 1
    • Jumbo Rare Players Pack (tradeable)
    • Jumbo Premium Gold Players Pack (tradeable)
  • Option 2
    • 2 x Jumbo Rare Players Pack (untradeable)
    • 2 x Jumbo Premium Gold Players Pack (untradeable)
  • Option 3
    • 1 x Jumbo Rare Players Pack (untradeable)
    • 1 x Jumbo Premium Gold Players Pack (untradeable)
    • 35000 coins