Sale appears to be the pre-injured Sale. Paxton's 1st MLB start in years was very impressive and IF he can stay healthy most of the season, he's the #2 starter.
Bello has the stuff to be a future #1, but right now he's the #3. When Whitlock returns, he's the #4 and Kluber is the #5.
This is a very respectable 5 man rotation, but it centers on Paxton being able to stay healthy.
If Houck returns to BP duty, it obviously improves the BP.